The crash video is horrendous, as is the most of the speculation in the media. Here’s my discussion of the video with Fox News:
To to watch, simply click here.
The direct link:
http://www.fox4news.com/clip/11103774/pilot-weighs-in-on-taiwan-crash
The crash video is horrendous, as is the most of the speculation in the media. Here’s my discussion of the video with Fox News:
To to watch, simply click here.
The direct link:
http://www.fox4news.com/clip/11103774/pilot-weighs-in-on-taiwan-crash
The search continues for the Digital Flight Data Recorder (DFDR) and Cockpit Voice Recorder (CVR) from the lost Air Asia flight 8501 and as that process drags on, speculation about the cause of the crash abounds.
Multiple news media sources advance abstract theories based more on the wide-open field of “what could happen” rather than what’s likely, serving only to blur the line between fact and fiction.
I won’t speculate on what happened to QZ 8501 because until the DFDR and CVR are recovered, transcribed and the recovered data analyzed, any theory advanced is just more noise in the media clamor aimed mostly at ratings rather than facts.
But, I can speak to what concerns me as the pilot of a modern, 160 seat airliner flying often in the same circumstances encountered by the lost flight. My goal in learning what the flight’s recorders report is simple: I want to know how to avoid a similar outcome.
With that in mind, here are my concerns. First, the slim margin between high speed and low speed limits at high altitude and the liabilities of each. Second, the problems presented by convective activity in crowded airspace. Finally, recovery from any inflight upset at altitude that may be encountered as a result of any or all of the above factors.
Early in any flight, the aircraft’s weight is the highest, limiting the ability of the aircraft to climb into the thinner air at higher altitude. As the flight progresses and fuel is consumed, the aircraft grows lighter and climb capability increases. Generally speaking, later in flight there are more habitable altitudes available due to weight constraints easing.
But don’t think that climbing is the only option for weather avoidance. Often enough, a descent is needed to avoid the top part of a storm, the anvil-shaped blow-off containing ice, high winds and turbulence. Equally as often, lower altitudes may turn out to have a smoother ride.
The other major climb restriction along frequently used jet routes is converging traffic. Aircraft flying opposing directions must be separated by a thousand feet vertically, so if I want to climb to avoid weather, I have to nonetheless stay clear of oncoming traffic. The New York Post reported the incorrect statement that the air traffic controllers handling the Air Asia flight “made the fatal mistake” of denying the Air Asia’s pilot request for a higher altitude. The first job of air traffic control is to separate traffic, particularly converging nose to nose. Climbing through conflicted airspace–or granting clearance to do so–would more likely be a fatal mistake.
But there’s even more to the story: air traffic controllers respond to such requests in a more fluid fashion than the static “no” being implied by many media reports. In actual practice, for a climb or descent request, the denial would be more typically, “Unable climb, you have traffic on your nose,” or, “It’ll be 5 to 7 minutes before we can clear you higher,” or, “We can vector you off course so you can clear the airway and traffic and then climb,” or, “Unable in this sector, check with the next controller.” Regardless, there are other options to avoid weather.
If changing altitude is not an immediate option, lateral deviation is the next choice. But the same obstacles–weather and traffic–may limit that option as well.
So now, if vertical and lateral deviation isn’t immediately available, you must do your best to pick your way through the weather with radar, if possible, until one of those options comes available (again, at ATC denial isn’t final or permanent) or you’re clear of the weather.
Which brings us back to the margin between high and low speed limit. This is even more critical in convective weather, because turbulence can instantaneously bump your airspeed past either limit if there’s not enough leeway to either side of your cruise Mach.
The picture below shows a normal airspeed spread in cruise. Notice the speed tape on the left with the red and white stripe above and the yellow line below the airspeed number box. The hash marks represent 10 knots of airspeed. The red and black marker above the speed readout is called the chain, and it depicts the maximum speed limit for weight and altitude. The yellow line below the numbers is called the hook, and it marks the minimum speed required to keep flying.
Turbulence, or more accurately, high altitude windshear, can bump you past either limit, or both, if there’s less than say, ten knots of slack, because moderate turbulence can cause swings closer to twenty knots; severe turbulence even more. Essentially, turbulence can instantly bump an aircraft out of its flight envelope.
In that case, the aircraft can depart controlled flight in a couple of different ways. The one that concerns me most is on the high end: if turbulence or any other factor pitched the nose down and the airspeed then climbed above the chain, the worst case is a phenomenon rarely discussed outside of the jet pilot community called “Mach tuck” that affects swept wing aircraft. Essentially, if you don’t immediately apply the proper corrective input, in a matter of seconds, recovery is beyond all means from the cockpit.
On the low speed side, if the wing stalls due to an airspeed below the hook, recovery is possible once the airspeed is regained. That takes altitude to regain, but normally can be done if a stall occurs at cruise altitude. But even that requires recognition and then the proper corrective control inputs, and Air France Flight 477 with three pilots in the cockpit entered a stall at cruise altitude but never identified the problem or applied the proper recovery inputs, resulting in a crash into the Atlantic that killed all aboard.
Bottom line: you need a wider spread between high and low speed limits in case of turbulence. If you can’t avoid turbulence and need to change altitude, you must assure a wide airspeed margin between limits to avoid being pushed by turbulence beyond either speed constraint. Here’s what the airspeed range looks like at high altitude:
There’s very little tolerance for turbulence and any associated airspeed fluctuation.
In the worst case scenario, if the aircraft is pushed beyond its flight envelope to the extent that controlled flight is departed, a pilot must quickly and accurately recognize which situation is at hand, high or low speed buffet, then immediately apply the correct control input.
Problem is, they may initially look the same, and the correct remedy for one applied to the other severely worsens the situation. Specifically, if the aircraft begins a descent at a speed beyond the chain, the corrective action would be to deploy speed brakes, pull throttles to idle, apply back pressure to raise the nose, and I’d be ready to even lower the gear to add drag, even knowing that would likely result in gear doors being ripped off the aircraft.
If this recovery is not done early in the pitchdown, the result will be a dive with no chance of recovery.
If a low speed stall is encountered, the proper corrective action would be to add power and lower the nose until flying speed was recovered. But, if the high speed departure–also a pitch down and descent–was mistakenly interpreted to be a slow speed stall, applying the slow speed recovery to a high speed departure would be fatal.
The other way? If you mistakenly added drag and pulled back power in a slow speed stall? That would prolong the stall, but if the correct control input was eventually applied, the aircraft could recover, altitude permitting.
Adding the factors that make this vital task of discrimination difficult would be any associated systems failure and the physical effects of turbulence that can make instruments nearly impossible to read.
In any pitch down, if rapid and deep enough, can cause electrical failure due to generators failing at negative G-loads associated with the pitch down. Yes, back up controls and instruments exist, but recognizing the situation, taking corrective action and reading backup instruments also takes time and attention.
Pitot-static failure, one of the contributing causes in the Air France slow speed stall, can also be difficult to recognize in turbulence or in an electrical failure.
Regardless, the high speed situation must be correctly identified and recovery initiated in a matter of seconds. Both situations would be difficult to diagnose and both recoveries would be very challenging to perform in turbulence and with any other systems failure or complication. Both recoveries are time-sensitive and if not managed correctly, one recovery could induce the other stall. That is, too much drag and power reduction carried beyond the return from the high speed exceedence can induce a low speed stall, and too much nose down pitch and excess power from a slow speed recovery could push you through the high speed limit.
So here are my questions, which are those that will be asked by The QZ8501 accident investigation board. First what did the aircraft weigh and what was the speed margin at their cruise altitude and at the altitude they had requested? What type turbulence did they encounter and what speed and altitude excursions, if any, resulted? What collateral malfunctions, if any did they encounter? And finally, what departure from controlled flight, if any, occurred, and what remedial action, if any, was attempted?
These questions can only be answered by the DFDR and CVR and my interest–and that of every airline pilot–is mostly this: I want to know what exactly happened so as to be prepared in case I encounter the situation myself, and I want to know what they did in order to know what exactly I should or shouldn’t do.
Like pilots at all major US airlines, I get annual simulator training in exactly these scenarios, hands-on practice recovering from stalls and uncontrolled flight. Is that enough? Can we do that better?
Once the facts contained in the flight’s recorder are extracted and analyzed, we’ll have the answers to all of these questions, which will help us prevent a repeat of this disaster. Beyond that, speculation is just a sad, pointless part of unfortunate ratings-hungry media circus.

“That’s some catch, that Catch-22.” –Captain Yossarian, Catch-22
Here’s the deal, captain: you’re flying a 65 ton jet into Orange County airport, the famously short 5,700 foot runway. The stopping distance required there is increased drastically if that runway is wet–and yesterday, “wet” was an understatement: Los Angeles was drenched in a ten-year storm dumping inches of rain in a matter of hours.
And here’s the catch: you want to have the least amount of fuel–which is weight–on board for landing to permit stopping on the short, rain-slicked runway, but at the same time, as much as possible for a divert if necessary to Los Angeles International Airport or to Ontario Airport, both of which have long runways.

But it gets worse. The best bet for a diversion is Ontario, because the inbound air traffic is light compared to always busy LAX. But you’ve been watching on radar two thunderstorms sitting exactly on the top of Ontario, hardly moving. LAX is reporting heavy rain which means inbound delays and you know from experience that the inbound LAX air traffic flow includes many long-haul flights from Asia, Europe and points beyond. You don’t want to elbow into their already depleted fuel reserves.
Here’s your set of decisions: who will fly the approach at SNA? It must be done perfectly, given the conditions, which are reported as 1 1/2 mile visibility in fog and heavy rain, with 200 foot ceiling. The touchdown must be exactly on the right spot–neither too early nor too late–and exactly on speed, if we’re to stop on the remaining runway.
What is your plan: SNA, and then what? No holding fuel–on a missed approach, you can either try again, or divert to Ontario (thunderstorm overhead) or LAX.
You already know landing in a thunderstorm at Ontario is a poor choice. And you know, realistically, you don’t have the fuel to handle the air miles entry into the LAX landing sequence will require. A second try? Not even.
Okay, captain–DECIDE.
Here’s what I chose on each question. First, I had the F/O fly the approach. Why, when it had to be done exactly perfectly under bad conditions? The answer is, because he damn well knows how to fly an ILS, in any circumstances. If he flies the approach, fully investing in the stick-and-rudder attention demands which are large, I can focus on the big picture: what’s the Ontario storm doing? Watching LAX too on radar. Updating SNA winds, our fuel, our position.
Above ten thousand feet, we talk. I tell him what I’m thinking, then ask: what am I missing? Tell me your ideas? And as importantly, are you okay flying the approach? Because a bad night of sleep, a sore shoulder, anything–if you’re not up to this, I’ll do it.
And we have one shot, I tell him, then I’m putting clearance on request (actually did that as soon as we were switched to tower frequency) to Ontario. If the storm looks impassable on radar, option 3 is declare an emergency for fuel and barge into the LAX landing sequence. Don’t like that idea, but if we’re down to option 3, there is no other choice.
I also plot the magic number for SNA winds: 110 degrees and 290 degrees. For the precision landing runway, any wind beyond those two cardinal points strays into the verboten tailwind area. Asked about landing the other direction and the answer was: long delay. Not possible, for us.
Already requested and had the data linked chart for our landing weight sent up to the aircraft: we require 5,671 feet on a wet runway, good braking, zero tailwind. Each knot of tailwind adds 150 to the distance required, so even one knot of tailwind exceeds the runway length.
I switch my nav display from a compass arc to a rose: the full 360 display. I’m getting wind checks all the way down final and watching my cardinal points, alert for an excedence.

There’s a wind display on my HUD, too, but I realize that’s a calculation that is at least 15 seconds old. Eyeballs and experience tell the tale: he’s glued mostly to his instruments to fly a flawless ILS, but I’m mostly eyeballs-outside, monitoring speed, azimuth and glide path through the HUD, but paying attention to the realtime wind cues. He knows if I don’t like what I see, I’ll say, “Go-around” and we will be on to option 2 immediately. I know that if he doesn’t like the way the approach is going, he’ll announce and fly the go-around without any questions from me.
I tell him that if everything is stable on approach, let’s make a final wind analysis at 200 feet. If we’re both satisfied, silence means we’re both committed to landing.
I review in my head the rejected landing procedure. That is, if we touch down but I judge we can’t stop, throttle max, speed brakes stowed, flaps fifteen, forward trim, back into the air.
Clear your mind, focus on the plan: hate math, but I can sure see the compass depiction that means a verboten tailwind. Poor viz in heavy rain, but once I spot the VASIs, I can tell what the wind is doing to us. He’s flying a hell of a good approach. One final wind check at 200 feet. “That’s within limits,” I say, just to let him know that component is fine. He’s flying–if it doesn’t feel right, I want him to feel free to go-around immediately.
I don’t want to see high or low on either glide path or speed. No worries–he’s nailed it, both are stable.
A firm touchdown, then my feelers are up for hydroplaning: none. Speedbrakes deploy, but we’re not committed until reverse thrust. The MAX brakes grab hold, good traction; we’re fine, reverse thrust, I take over at 100 knots.
Silence in the cockpit. “Excellent job,” I say as we clear the runway, glad we didn’t have to execute either backup plan. Relief, Boeing has built us a damn fine, stable jet for this weather, this day, this runway.
Now, put that all behind–we still have to fly out of here in less than an hour. And do it all again tomorrow.
There’s a blessed silence in the cockpit right before pushback, immediately after the number one flight attendant reports “cabin ready,” and slams the cockpit door securely shut. Before that, the usual boarding chaos filters through the open cockpit door, the clatter of catering the forward galley, ramp workers stepping in to deliver some cargo paperwork, maybe some aircraft maintenance techs wrapping up required service or repairs.
But the noise and activity isn’t all that ends with the door slam. We call it “sterile cockpit,” an industry-wide concept rooted in the best Crew Resource Management (CRM) practices that dictates all non-flight essential conversation ceases in order to focus solely on the prescribed, often complex procedures required to fly the jet.
In other words, leave all distractions behind and keep your head in the game. And I take that concept a step further–I clear my mind of everything except procedures (there are a multitude) and situational awareness: he’s moving, we’ll wait … wingtip clearance here … wind shift, at least for now … we’re heavier than planned.
Not just sterile cockpit verbally, but mentally as well. When you’re moving eighty tons of metal and a hundred sixty warm bodies, there’s no room for distraction. My airline (like most, I assume) has done a good job of minimizing outside considerations through the basic premises from which the pilot-in-command operates.
For me that means I’ve “pre-worried” about the extraneous considerations–both yours and mine–and for the good of all, I’ve put them aside, compartmentalized them, and now look beyond them. When I say yours, I mean your down line connection, your time schedule, your reason for flying whether business or pleasure. Mine often overlap yours–my days off, my family plans, my important events, even my own physical stress of time zone shifts, late hours that could creep later, and my pay considerations.
Doesn’t mean these concerns are invalid, unimportant or dismissed–they’re just not on my mind as I balance crucial flight variables as they unfold. They’re fully addressed in the basic premises of our airline operation, stipulated in a hierarchy a passenger might not like, but which makes the most sense for a safe flight operation:
First, safety, second, passenger comfort and third, schedule. Yes, your connection, even your arrival time, is in third place. Just remember, I have similar personal concerns and I’m putting them completely aside as well. Here’s why.
A recent Flight Safety Institute report highlighted one of the factors that contributes to the comparatively high accident rate per flight hour experienced by air ambulance operators. One factor mentioned was the very real life or death pressure perceived by the pilots: if we don’t land on this spot, at this time, regardless of circumstances, a life may be lost.
That’s a very vivid and understandable urgency that would be difficult to put out of a pilot’s awareness. Nonetheless, the air ambulance operators with the lowest accident rates are the ones who’ve put CRM at the forefront, refocusing on flight safety limitations as a governing principle and setting aside all else.
Now, your kid’s birthday, your business or other event, yes, they’re important–so are mine. But they aren’t life or death, are they? But as flight distractions, whether it’s an air ambulance or an air carrier, they could easily become exactly that.
From the moment we push back, the clock in my captain’s mind runs on weight, not minutes: how many pounds of fuel do I have, which translates into the ability to remain aloft. So, when you (or maybe a commuting crewmember, to be fair, asks “can we fly faster to make up time,” the real question in my mind is “can we afford to gamble by shortening our available fuel duration, and to what purpose and at what cost?” Less holding time available at our destination, maybe requiring a more stressful approach? No way.
The answer to “purpose” would be to shave off 5 to 10 minutes–hardly worth it–at the price of degrading our ability to arrival delays because of an increased fuel burn for speed. The question “can we top this weather rather than circumnavigating the area to save time” brings the opposite answer: maybe, but the more prudent option is to avoid–so we’ll spend the extra time (sorry about your connection–and mine) to do that.
And if you think we as pilots don’t have crucial connections, think again: besides losing pay in a misconnect, there’s more. For many crewmembers, even a ten minute late arrival can mean the difference between getting home or spending a night in a hotel at their own expense and losing a day with family. Sure, I eliminate that worry by not commuting, but crew base positions are determined by seniority–junior pilots and flight attendants can report to work and receive the official notice, “as of next month, you are based a thousand miles from home.”
That all needs to wait outside the cockpit door. Inside, we must focus on the vital flight considerations that trump all distractions.
Again, arrival time–and connections–hang in the balance, but that’s a distant third place behind safety. So yes, I’m not thinking about your connection–and you should be glad. Because that’s exactly what you’ve paid me for, and you deserve no less than the safest, most professional flight, no matter how long that takes.
Fly the jet firsthand:
These 25 short essays in the best tradition of JetHead put YOU in the cockpit and at the controls of the jet.
Some you’ve read here, many have yet to appear and the last essay, unpublished and several years in the writing, I consider to be my best writing effort yet.
Own a piece of JetHead, from Amazon Books and also on Kindle.
He’d started out as a brick hod carrier, Frag had, working his way up from the grunt labor of the laden, creaking wooden hod to the old-world artisan status of a bricklayer and along the way, reducing himself in name only to the fractional monosyllable “Frag” as he did. That seemed enough for him, or so he’d said. Because what he did was larger and more weighty than anything he was ever called.
“You, college boy,” he fairly barked in a gravelly smoker’s bass that typically ended in a hawk and a spit. “You ain’t nothing now ‘cept dog-hauling a hod for journeyman Frag.” He liked to refer to himself in the third person, and me as College Boy, reluctant hourly summer help, just some kind of cardboard thin cutout of a not-Frag, not perilously balancing a hod on the fourth floor, open girder structure as he had in an old-world, long lost tradesman reality.
And he was right–about that but even more: soaring buildings took shape on blue-lined white paper derived from computer-assisted draftsmen in thin ties and nine-to-five safety free of an unbalanced hod laden with the real heft of mortar and sand, the reality of what they designed, brought to life by the wiry tough, nut-hard muscle of Frag. And to a lesser degree, gofer College Boy me. Bound to the ground, all of them, till Frag gave them flight, story by grunting story.
The sweat equity, dirty fingernails payout of the endless hods Frags and lesser College Boys wrestled–you didn’t “carry” a hod, you balanced it–commanded the dreamscape of architecture and sweatless design to life on a gruntscape of muscle and brick placed just so, line to certain line, mortar scrape by deft, artistic bricklay and tap, brick by a thousand bricks, up into the sky.

I can never forget the achy weariness of burning college boy sinew, sun-baked of dry labor days and even after work, crazy beer-fueled joyrides balancing atop, for no sensible reason, Frag’s battleship-sized beater Pontiac as he’d fishtail and rage through a dirt-clodded, unpaved construction site. Why? Because Frag was bigger than all that, larger than anything they could design and he could build, that he orchestrated brick by brick with his callused hands and college boy’s dog-like, tongue-hanging dragging labor. Real work is only what you do with your hands, where your bring paper and promise to life. To flight.
Not so labor-coarse are the hands today resting atop the thrust levers harnessing a straining draft horse team bucking fifty-thousand pounds of jet thrust. Stand hard on the brakes and haw the team to roaring life, needing to know, to feel it, read it, personally. Sure, there are a thousand lines of computer code flowing through electric sinews monitoring the ungodly torrent of fire and fuel, metal and power slung under wide swept sleek wings howling against the brakes but no matter: journeyman Frag knows it ain’t right till it feels right, looks true as a plumb line to a tradesman’s eye for “right,” for launching more than a towering design, yet no more than that in the play out of someone else’s grand plan in the sky.
To my right College Boy, jet edition, eyes me warily as I hold it all in my tight-handed, set jaw grasp, squint-eyeing what we’ve built to be sure, to know it’s true. Hah. Stand on the roof, college boy, and hang on. We’re going to fly, make it soar, like never before or again.
Live it, fly it with me:
These 25 short essays in the best tradition of JetHead put YOU in the cockpit and at the controls of the jet.
Some you’ve read here, many have yet to appear and the last essay, unpublished and several years in the writing, I consider to be my best writing effort yet.
Own a piece of JetHead, from Amazon Books and also on Kindle.
Air Travel and the Ebola Circus.
“If we couldn’t laugh we would all go insane.” –Jimmy Buffet
Government leaders are frantic to do something, anything, to assuage concern about the potential spread of Ebola. But air travel is neither the problem nor the solution.
Nonetheless, the government answer is, as in so many crises, that even doing a useless thing is better than doing nothing. So we now have “increased screening” at several airports, including JFK. But the problem is, the Ebola patient who died recently in Dallas arrived from Brussels, while the increased screening targets passengers arriving from Liberia, Sierra Leonne, and Guinea. One connection later, as in his case, the possibility of detection is beyond the “new” screening.
Meanwhile, no mention is made of special screening of international arrivals in Los Angeles, San Francisco and Seattle, all of which have seaports and airports with regular international arrivals from Europe, Asia and the Middle East. The Dallas Ebola carrier could just as easily have entered the US on the west coast–or through DFW, Chicago or Miami for that matter–with no additional “screening.” And the notion that increasing screening at certain airports is the solution sidesteps the fact that a traveler could arrive in Mexico City or Toronto and simply drive or walk across the border; or, working a cargo, tanker or cruise ship, simply enter through any seaport. Again, it’s not air travel, it’s global mobility that is the vulnerability.
In any case, the special new air travel screening is really little more than a drug store twenty dollar digital thermometer and a lot of self-reporting. That charade is more theater than medicine, as Ebola has proven time and again, lying dormant well past the initial examination. The “enhanced” screening ignores the majority of the arrivals, and has a limited accuracy due to the incubation period of the disease, for the small minority of international arrivals who are screened. And there’s no special screening for the enormous flow of rail, sea or motor transportation across our borders.
And even worse yet, the lynchpin of the “enhanced” screening procedure is truthful answers to posed questions. The Dallas Ebola carrier simply didn’t report his exposure in order to enable his travel and the new “temperature check” wouldn’t have–and didn’t, as he departed Africa–detect the latent disease anyway.
Given the high profile of Ebola as news media rush to cover and broadcast a “scare,” it was inevitable that panic would attend an incident of vomiting on an airplane. But the reality is, passengers getting airsick is as old as air travel itself. I used to take it personally as a pilot, as if I’d somehow not flown smoothly enough. That was until I noted that even just taxiing out from Las Vegas or New Orleans was often attended by hangover puking in the cabin. Now, however, this typical, ugly occurrence warrants a Hazmat response, plus YouTube and Twitter coverage of the unfortunate event.
The crossroads of Ebola and air travel is a cataclysm of the news media at its worst and social media at its best: the tail wags the dog as regular news sources struggle to keep up with the instantaneous digital grapevine of Twitter, Instagram, Facebook and YouTube.
In the end, cable and broadcast media abdicate their responsibilities to investigate and report facts and simply show random, unmediated Tweets and video clips and call it news. As a nation we’re all the worse for indulging in group hysteria, but it seems that nothing is more important for an individual with a cellphone than a shot at the Andy Warhol fifteen minutes of fame which the desperate-for-headlines news media recklessly offers. Culture, unfortunately, trumps common sense and journalistic ethics.
Meanwhile, the government implements showy passenger screening changes for air travel only and calls that prevention, neglecting any meaningful intervention in a global threat by attacking the disease itself. That in a nutshell is the hopeless tragicomedy that is the “first world” public and government response to a deadly plague.
Because while the media microscope is trained on flights and “screening,” the root cause languishes in the background. In reality, controlling global mobility by all modes, and developing a vaccine is the right strategy. But that sensible call to action seldom heard above the media uproar about air travel. Which only confirms for me what a very wise woman I know is wont to say: “We are a nation of idiots.”
So as Jimmy Buffet suggested, we might as well laugh about it while we can, or at least until someone finally (if ever) looks beyond air travel and focuses on a real containment strategy, plus a vaccine. Because as I’ve said, air travel is neither the problem nor the solution.
Meaningful action won’t come from the fumbling “government,” and it sure won’t be the hapless news media. But the joke’s on us until then.
Airliners, Ebola, Myths and Facts
The most recent communicable disease being linked with air travel as a possible factor in its spread is Ebola, which joins a long line of other contagions, such as SARS, H1N1, Hepatitis and even the basic flu, in the screaming air travel headlines.
There are two ways in which air travel could actually be a factor in the spread of such infections. First is the simple reality of transporting those infected to an uninfected area, and second is the propagation of infectious elements among people near the disease carrier.
This last consideration is medical and comes with contingencies well beyond my level of expertise. But what is absolutely common knowledge is that countermeasures in any public place–which an airliner is–are rudimentary. Your airline seat–like your theater seat, your seat at a dinner table, a taxi cab, a bus, a classroom, or any public area–is not sanitized before your use, no matter who sat there before you. That’s the public health standard in the modern world.
Yet the media rushes to the airport to show file footage of an airliner, then grab man on the street interviews with deplaned passengers, asking if they’re concerned about being exposed to [fill in contagion du jour] from other passengers who have visited [fill in global contagion hotspot] from possible proximity to an infected person.
It’s a short leap from there to certain urban myths about air travel. First, and most persistent yet absurd, is “passengers are in a sealed tube, breathing the same air.”
The reality of an airliner is yes, the hull is pressurized, but no, it is not sealed. In fact, the fundamental link between pressurization and air conditioning on a passenger airliner at all altitudes is a constant outflow from the jet in flight, into the atmosphere. The controlled outflow is key to moving volumes of air through the cabin in a deliberately designed pattern for many vital functions beyond passenger comfort.
In a Boeing 737-800, that carefully crafted flow pattern drives air from two air conditioning systems through the cabin and cockpit, down through the forward electronic equipment bay below the cockpit where it picks up residual heat from electronic systems to keep that vital equipment at optimum operating temp, then the airflow proceeds back around the cargo compartment, keeping that compartment from getting too cold, then overboard through an automatically modulated outflow valve.
Key to that process is flow. The plane is not sealed, so constant airflow is mandatory–and here’s where another urban myth surfaces: airlines are limiting airflow to save money.
The fact is, airlines are increasing airflow to save money: in our Boeing, we have two large, powerful recirculating fans driving airflow which in basic Venturi logic, draws air from the air conditioning systems and eases the workload ultimately on the engines from which the bleed air is tapped and thereby increasing fuel mileage.
The urban myth about decreased aircraft airflow to save money probably originated in the early seventies when the OPEC oil embargo drastically spiked fuel prices. Airline engine technology was simpler and less efficient before today’s high-bypass fan engines were developed. But even then, less bleed air really never improved airline fuel burn and regardless, an jetliner was never a sealed tube and always required metered outflow balanced with input to maintain pressurization.
“Raising the altitude in the cabin to save money” is the third urban myth with no basis in fact. First, in the Boeing, pilots have control of the rate of change only–the cabin altitude is set at a constant differential between inside and outside the hull based on maintaining the strength of the fuselage. Hollywood may have inspired the myth that pilot can “raise the cabin altitude,” but the only thing we can actually do is climb or descend and when we do, the pressurization systems maintain a constant differential and a constant airflow in order to maintain structural integrity of the fuselage.
So back to my original point: yes, airliners are the hardware of mobility that now mixes populations experiencing regional outbreaks with others a world way, but only in the modern sense of scale: all continents are now linked by air travel in hours rather than days or months of travel. But travel itself is the fundamental reality of the twenty-first century, period.
And that mode of travel, “air travel,” is neither conducive to propagation any more than any other public place, nor is any airline adding any infectious risk to “save money.” The most glaring stupidity in that persistent myth is the vital contingency the the flight crew must blindly increase their own health risks to do anything of the kind.
In the passenger airline flight crew world, we often refer to an airliner as “the flying Petri dish,” because people with every communicable disease board, fly, sneeze, hack and cough just as they do in any public place. But that’s no different than the environment endured by the first grade teacher, the restaurant waiter, or pediatric nurse.
And the airline seats are about as “sanitized” as the movie seat you sat in, the tray table as “clean” as the restaurant tabletop the busboy just wiped with a wet rag dipped in tepid, hours-old water from a well-used bucket.
In other words, as far as infectious disease exposure risk, an airliner is just like any other public area–we just move faster and more frequently from place to place. It’s not a sealed tube, no one is reducing airflow or raising the cabin altitude to save money.
So use common sense about flying, recognize the airliner cabin as a public place and behave accordingly (thanks for mopping the lav floor with your socks, BTW), and breathe easy when you do, knowing the truth about these unfounded flying myths.
More insider info? Step into the cockpit:
These 25 short essays in the best tradition of JetHead put YOU in the cockpit and at the controls of the jet.
Some you’ve read here, many have yet to appear and the last essay, unpublished and several years in the writing, I consider to be my best writing effort yet.
Priced at the printing production cost, this collection is not for profit–it’s for YOU to keep.
Own a piece of JetHead, from Amazon Books and also on Kindle.
Slap that alarm in the dark; AGAIN … now it’s on the floor. Damn. Fight your way out of the amnesia of sleep, gradually rejoining the world: damn again–realize you’re not home, this isn’t your bed, your stuff and consequently, not your day. That’s the Original Sin of air travel: you sold the day, wet-leased it, and your flying skills to the airline whose uniform is strewn in a trail leads from the door of the hotel room, across the floor and to the bed you’re finally rising from, stiff, un-caffeinated and rumpled, inside and out. You bought the ticket–you take the ride.
Darkness in a time zone east of your own is a double-whammy: it’s early, earlier still from the time change, and it’s only a charcoal gray dawn as night relents but grudgingly. And listen: rain, but not only rain, wind-whipped and cold-slung pellet rain, one of the reasons you don’t live in this “there,” one of the many “theres” far from the “here” of home, but also with too many good reasons why it isn’t home: like early season pelting freezin’ rain. Be glad you’re not waking up as First Officer, who’ll have to do the exterior preflight.
Light? There … on; sit. Good dog. And there’s another flash in the back of your mind, a cobalt pilot light ever glowing, growing: sky. Flight. The reason of the day, for the day sold to the owners of the jets you get to fly. The sky, blue as the speck in your mind, the gas blue sheen but a down payment, earnest money, underwriting the rest of the day in the blue.
Around “there” (check the nightstand before acknowledging where exactly “there” is–the phone book has more than once corrected a faulty assumption: “Oops, Cleveland, not Columbus”) the gears of life will turn differently for a hundred and fifty other early rising souls who’ll converge with you on the boxy stacked concrete airport. For them, “here,” your “there,” is home. They’re leaving home, you’re just leaving “there.” You wish the best for them and their “there,” wherever that may be.
Wrestle with aerodynamics from your first waking moment: the Venturi effect of the shower sucks the Saran Wrap-thin hotel shower curtain inward to mat against the body you’re trying to wake with trial-by-needles of always “too” hotel bath water: too hot, too cold (no in between), just be done with it.
Double-bag the in-room coffee maker: regular plus decaf equals stout yet blah but passable brew. Reassemble the uniform, throw everything back into the bag with five minutes to spare before show time. That’s both literal and figurative: the show time for the crew, the “AIV” (Ass In Van) time to leave the hotel, plus showtime for the non-crew. They will either to ignore you (my fervent hope) or engage you, which will go all kinds of wrong unless you hide behind a phalanx of flight attendants who are professional at “friendly, especially before an entire day of thoughtless and often rude passenger behavior.
Through the airport, selective eye contact. You don’t need to hear anyone’s tale of terror and the plane allegedly falling thousands of feet and blah blah, whatever. And you definitely don’t want to hear any guy’s (why is it always men?) explanation about why they’re not a pilot, because there are too many damn good reasons why you shouldn’t be a pilot but you refused to give in. And there were too many in the Air Force pilot chase–including you, at times–who were scared shitless in some of the flying but didn’t quit, and even some who died in the trying and flying anyway. So let’s avoid that eye roll.
Silver tail: there she is. Heart skips like a first date: she’s beautiful, here for you, yours all day. Let’s get to work.
Morning light struggles with tumbly dark clouds tacking the sky like schooners on a gale. Sheets of rain rake the Tarmac and the big tail bucks the gusts, rocking the jet. A cup of coffee, a bar of something with a side order of precision: weights, power settings, instrument departure route, climb and cruise. Certify that it’s correct–get your phone out and call for more fuel: DO IT. You never regret that later.
The slow trundle aboard the ark continues under the background music of the tower frequency and an electric monotone issuing clearances; wait for your own. Verify each point. Scan the sky, eyeball to eyeball, what’s it really doing? You have the weather report, but you don’t fly on paper. Who’s winning the fight for the sky?
Cracks of indigo and slats of sunshine joust in the heaving sky as morning clears its throat making way for noon. It’s the early blue that’s best, a dark, hard blue promising so much more than an evening sky that’s mostly a grudging, sighing concession to an overpowering night. Savor the taxi out, careful, slow, watching the sky fight itself, clearing, tearing up the rumpled angry cloud banks and flinging them east like a dissipating surf boiling away against a rocky shore.
At the right moment (at last!) it’s time to climb; pour on the coals, ride the thunder, ascend, climb. Through the clouds then above, let them all fall away with the earth, somebody else’s squabble now. Salvation in flight, above the dirt and rocks and concrete and asphalt and hotel shower curtains, time away, not here but there but now away; suspended between here and there by the salvation of flight.
There’s the hard blue redemption of a sky that deepens the higher you fly, going to black straight above. Quiet crystalline cold, smooth; the big jet cruises with ease. High enough for now, Icarus, perched in the blue, halfway to there. Savor the flight while it lasts.
Now you can own a piece of JetHead:
These 25 short essays in the best tradition of JetHead put YOU in the cockpit and at the controls of the jet.
Some you’ve read here, many have yet to appear and the last essay, unpublished and several years in the writing, I consider to be my best writing effort yet.
Priced at the printing production cost, this collection is not for profit–it’s for YOU to keep.
Own a piece of JetHead, from Amazon Books and also on Kindle.