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“Everyone’s got a plan until they get punched in the face.”
–Iron Mike Tyson
The factors that shape a diversion strategy are both quantifiable and variable. Variables include weather, traffic density, airport crowding, holding pattern location, and what I call wild cards, which I’ll discuss later.
Quantifiable factors include altitude, speed, distance, time and fuel. Though there are many foundational points upon which to anchor a diversion strategy, I center mine on the one controlling factor common to every other facet of the decision: fuel.
That’s one very simple and unifying parameter that is reliably quantifiable and easily revised accurately. So, let’s start at the beginning with known fuel numbers. First, what is your required (you, the pilot, determine this) minimum on-deck fuel? Set that number in stone. For example, in a 737-800, I want 6.0 as a minimum in a divert situation. 5.0 is adequate, but in a divert situation, you really need to pad everything.
Next, the added fuel for holding. Dispatch adds holding fuel to a release when you and they agree on how much you’ll likely need based on destination variables like weather, construction, traffic density and more.
The reserve fuel added for holding presumes you can hold for a specified time, fly an approach to a missed approach, then proceed to a landing at your alternate with your agreed upon (6.0, in my example) fuel.
But in the fuel planning phase, no one knows exactly where you’ll hold nor at what altitude. So, you have to work backwards from your approach to your holding fix: how much fuel will you need from holding to missed approach? Flight planning systems figure an estimate, because again, you can’t know for sure where you’ll be sent to hold.
And here’s where we encounter a few wild cards: we’re not sure where or at what altitude we’ll hold, so we really can’t confirm a fuel flow or total enroute burn. Also, we can’t rule out spacing and delay vectors enroute to the initial approach fix, nor non-optimum speed and altitude assignments along the way. Same thing with the missed approach: there could be multiple vectors, speed restrictions and worst of all, a much lower altitude for the cruise leg to your designated alternate.
Throw in another factor: priority. If you’re planned to land at the same time as international flights that have been airborne for eight or more hours, you may find—contrary to what ATC might say—that you are vectored around or behind these flights. All of these factors can radically affect your fuel burn for the worse.
Step one: as you enter holding, you can and must determine the probable fuel burn from holding to your destination. Add that to your on-deck minimum. In my example:
Holding at an intermediate STAR fix:
6.0 + 2.5 = 8.5
Now we need to add the planned enroute burn from missed approach to your designated alternate. From DFW to TUL, a typical alternate, that would be an unadjusted 4.5. But we need to adjust that, adding a significant pad for the wild cards I cited above. I’ll add another 2.0. We have:
8.5 + 6.5 = 15.0
So, 15.0 is your bingo fuel: at 15.0 we’ve lost the ability to go missed approach and divert. What’s the next step? Figure the minimum fuel from your holding position to your alternate. Add a pad for the wild cards, and you have your bingo from holding.
If it takes me 2.5 to get from holding to TUL, I add a pad (1.0) and add that to my on-deck minimum:
3.0 + 6.5 = 9.5.
So, 9.5 is my bingo from holding direct to my alternate.
Why the difference? Simple: if you’re holding for a variable that may clear (weather, closed runway, traffic sequence, runway change, and more) you may have an option besides divert. As long as my enroute burn from holding to destination is equal to or less than the burn to my alternate, once the holding cause is eliminated (“DFW is now VFR”) we can proceed safely to our destination and land with 6.5 or more.
And here’s another wild card you can play: ask for a different holding fix. Chances are, in major airport areas (ATL, JFK, MIA, ORD, LAX) the answer will be no. But in many other places, ATC may grant your request. You can even fudge it by adding “for weather” to your request, which sounds the same as what it really is: “For whether or not we can hold longer.”
A different fix offers one more good option: if you’re not in a stack, you won’t have your fuel burn incrementally increased as you’re assigned a lower altitude. Add to this asset an EFC synergy. Some pilots like to “Go Ugly Early” and divert if their EFC exceeds their planned holding time. But, if you’re sitting high at a comparable fix away from the descending stack, you can safely loiter till your EFC just to see if the EFC shortens, as it often does.
For example, if you’re given a 50 minute EFC and have planned for 35 minutes of holding, chances are decent that if you’re still holding at 20 minutes, that EFC might be cancelled or revised to within your holding fuel.
A second wild card is to find a different suitable alternate, possibly close-in. For example, instead of OKC or AUS for DFW, if the weather movement allows, AFW, DAL and even SPS (daytime only) maximize your loiter fuel and when you’re refueled and outbound, you’ll be cleared from tower to approach, rather than tower to departure then center, which may get you slapped with a traffic flow wheels-up delay.
Other good reasons for choosing a different alternate include crowding (you don’t want to be the last jet in line for fuel or a gate) and even time of day for staffing requirements. Finally, if you’re going illegal as a crew as soon as you divert, do you really want to spend the night in Abilene, or would Austin be more “sensible?”
Regardless, the bottom line is this: your minimum on-deck fuel. Add generously padded buffers for the wild cards, plus figure both from missed approach and direct divert. Monitor both figures. The 737-FMS will display both direct and missed approach fuel predictions—monitor both. We also often put in three or four different potential divert airports and monitor both figures for all of them.
As captain, I ask two things of the first officer. First, “What am I missing?” Not, what do you think of my plan—I really want to know what I’m not thinking of and what would be better. And second, I have the FO pick a divert alternate, and monitor both numbers. That keeps us both in the loop, keeps both sets of eyes on all the fuel numbers and finally, two heads are better than one. They both need to be fully in the game.
And that, fellow aviators, is one pilot’s strategy. Good luck and fly safe.
I stood in the cockpit doorway last night saying goodbye to the deplaning passengers, mostly to support my cabin crew: it doesn’t seem right that the captain should be halfway to the employee parking lot while the flight attendants are still working. So I stay, unless there’s a crew change and the next cockpit crew is waiting to get started on their preflight.
That’s a ridiculous air travel roadblock: you’re the oncoming crew, probably behind schedule, having to wait for the off-going crew to finish fumbling around and get out of the way. “Plane ride’s over,” or “shift change,” I yell loud enough for them to hear in the cockpit. In other words, get your ass in gear and get out of the way. Some pilots are clueless, gabbing, or worse (sure, we’ll all wait while you use the airplane lav–you sure can’t poop in the terminal) while the oncoming crew cools their heels on a hot jet bridge, waiting for access their job site.
Meanwhile, we have passenger connections to cover down-line, plus more passengers there connecting on our return flight. Ridiculous waste of time changing crews, due to some pilots’ blissful unawareness of others.
But a crew change was not the case last night–the aircraft was not flying on again that night. A guy walked up the aisle with the other deplaning passengers, but he took a seat in first class and started tapping on his phone. His wife plopped down next to him.
Fine. Except once everyone has deplaned, the crew is done. It’s been a long day and we all want to go home.
His wife looked stressed-out. Finally, she approached me. “He’s trying to get someone from customer service to help him retrieve my gate checked bag before our next flight.”
“Gate checked bags will be transferred to your connecting flight,” I answered automatically. “No worries. It’ll be at baggage claim at your destination.”
“I need my anti-seizure medication.”
Damn.
“Let me see if I can find it.” I hustled downstairs, but it was too late: all of the cargo holds were empty, the bags on their way to connecting flights or baggage claim.
“They’re usually not that fast unloading a full jet,” I told her. “But there’s nothing left in the cargo holds or on the ramp. Still, I can get you medical help right now if you need it.”
That’s part of the problem: passengers miss the instructions in the sometimes hectic gate checking of a bag: “Take any medications or important documents out of the bag before you check it,” agents recite the litany.
But mistakes get made. More typically, stuff gets left on the aircraft inadvertently. So here’s the point: always keep valuables, important documents and medications in your on-board hand-carried bag. If you don’t carry one–DO.
Don’t stash ANYTHING in the seatback pocket.
In the terminal, a woman stopped me and started talking to me in Spanish. I can help in German or English. But I answered with the entirety of my Spanish lexicon, “No habla Espanol.” I do know “Cerveza, por favor” as well, but that didn’t apply.
She looked puzzled, then began to repeat herself in Spanish, only louder. Which still doesn’t work.
I played the odds: I glanced at her boarding pass, then pulled out my cellphone and Googled her flight number. I showed it to her: departure gate and boarding time.
She smiled. “Ah, si.”
Problem solved. Add the lesson “Google for key info in your native language,” to “get your shit together and get off the plane” (add the caveat, “but wait your turn,” see cartoon) and keep all valuables and medications with you as you travel.
Don’t be “that guy.” Wait your turn.
Finally, traffic management. We have rush hour in the terminal between flights. There’s a bustling flow of people going gate to gate to concessions, services, restrooms, wherever. There’s always been the problem of passengers lurching around the concourse, stopping randomly and bottle-necking traffic.
Add two new impediments: the cellphone talker-texter-Facebooker-Snapchatter-Instagramer-surfer ass-clown willing to walk headlong into others or as bad, shuffle-creep along to manage their messages, posts, texts, porn; whatever.
For the slow walkers, random stoppers and cellphone nitwits, two words: pull over. Get out of the way, let others get on with their lives as you fumble about your own.
The second pedestrian hazard I see more and more these days–maybe it’s a millennial thing–is those with or without cellphone suddenly putting it into reverse and walking backwards. I say at least twice an airport day–which, like dog years, an “airport day” is about 7 times the hassle of a human day–“this isn’t a good place to walk backwards.” Does that really need to be said?
So there you have it. If you’re deplaning–passengers or crew–get your stuff together and move efficiently off the aircraft and into the terminal. Once there, have a destination in mind and actually attend only to smoothly navigating the traffic, always in forward gear. If you need information, Mr. Google speaks every language, though I do not. Finally, keep all valuables, like medications and documents with you at all times.
All of the above advice is for your successful air travel, your crew’s efficiency, and everyone’s sanity.
There are “gotchas” in air travel you might not know about–but should. Many are of the “some restrictions apply” and “read the fine print” type; some are matters of inconvenience, some are very expensive. Here’s my “gotcha” list:
— “Volunteering” to be bumped for oversales. That’s fine, if you are assured of positive space on another flight. Sometimes (and some airlines) will give you the promised compensation (typically a travel voucher), but not positive space–you’re standby, and you may be stuck for a long time. Be sure to specify positive space before you accept the voucher and relinquish your seat. I’m just enough of a pain in the ass to ask for boarding passes just to be sure.
Know your passenger rights.
–Misconnects. Know your rights, but as importantly, know the gotchas: if you used certain air travel broker sites (Travelocity, etc), your misconnect may not be covered for further travel by the airline. I’ve seen frantic passengers rush up to a gate where the flight had departed, asking to be put on the next flight. Problem is, the “CheapFlight.com” that sold you your ticket is not part of the airline and you may not be entitled to the next flight–or any flight other than the one that departed. Know this ahead of time or you may find yourself shipwrecked.
–Misconnects Part Two: compensation (hotel room, meals) will not be offered by or required of an airline for events beyond their control, like weather delays, diversions and cancellations. So, if your flight was the last of the day and you missed the flight due to circumstances like weather, plan to sleep in the terminal or spring for a hotel room yourself. which brings me to …
–Travel insurance. Buy this from a reputable travel agent or AAA. Policies can pay for that unexpected hotel room for a short overnight (tip: Minute Suites in many major airports have hourly rooms and they’re inside security, saving the screening time as well as the van ride to and from) and other incidentals and losses, like the vacation condo you’ve already paid for.
As importantly, a decent travel insurance policy can cover unforeseen costs like a rebooking fee if you become ill or some other exigence requires a change in your plans. Along those lines, you should be certain that your medical insurance will cover treatment in non-US locations and travel insurance can help cover the cost gaps.
Seems like few people consider travel insurance but with your vacation time being scarce and costs high, travel insurance makes sense.
–Aircraft Power Ports. Many flight attendants don’t even know this: there’s a maximum amperage draw allowed for the entire cabin. Aircraft manufacturers design the system with an average amp load, but a full flight, depending on what passenger items are drawing power, the demand often exceeds the design limit. When that happens, no power for you, at least until someone else unplugs. Moral to the story: if you have a device that needs charging–plug it in as soon as permissable in flight.
–Aircraft WIFI. See above: the WIFI bandwidth is limited. If you have something important to up- or download, do it as soon as possible or you may find the internet crawling so slowly that your data will not be accessible or transmittable.
So there you have it. Some of these issues are nuisance items, other are major league expensive travel disasters. The moral to the story is to be prepared, consider the possible problems and decide how you’re going to handle them BEFORE you leave port.
Look, I get it: I sit in both ends of the jet for some very long delays. My last two turnarounds were planned for 7 hours but turned into 8.5 and 9.1 respectively. That made my pilot duty day, with preflight and ground turnaround time, over 12 hours.
Me deadheading in the very last row of coach, carefully not man-spreading and conceding the armrest to the middle seat passenger (basic air travel etiquette, BTW)
We waited over an hour for takeoff, then had additional holding in the air before landing at Philadelphia International Airport.
I’d deadheaded up to Philly to fly the jet back to DFW Airport but the result of the Air Traffic Control delays getting the jet off the ground in DFW and enroute to Philadelphia made our Philly-DFW flight well over an hour late into DFW.
That caused many passenger misconnects once we arrived at DFW after yet another round of airborne holding for nearly an hour. My flight plan from Philadelphia to DFW called for a flight time of 3:27 but with holding, the actual flight time became 4:30.
That’s due to storms moving through the north Texas area faster and more southerly than predicted, constricting air traffic routes into DFW. So, we were delayed by ATC for an hour holding over a fix southeast of the airport after an enroute course refile to avoid weather.
I ain’t complaining, but I got home at 2am instead of 11pm. That’s my job and I did it correctly and safely for all 167 folks on board.
But that’s not the big picture. What’s driving ever-increasing air travel delays? Here’s my Top 3 Factors.
The storms often do not conform to the FAA predicted movement, causing yet another layer of reroutes and delays.
3. Airline “banking” (the grouping of inbound-outbound flight exchanges at hub airports) cannot handle the disruption of hours-long delays: when one complex or “bank” of flights is delayed outbound, there’s nowhere to park and deplane the next complex. This leads to individual airline-imposed ground stops: your flight will not be pushed off from your origin airport gate until there’s a reasonable expectation of gate availability at your arrival hub. This is to avoid the old “sitting on a tarmac with toilets overflowing waiting for a gate” urban legends that engendered the Passenger Bill of Rights.
Given the ubiquitous eye of cellphone video and social media, passengers can count on more origin airport outbound delays: major carriers will always defer to the Passenger Bill of Rights, allowing you to deplane at will at the departure station rather than sit on board at your destination, trapped for hours waiting for a gate at a weather-affected hub while ranting on social media.
There are other factors creating and lengthening delays, like an industry-wide shortage of qualified airline pilots and airline planners who over-optimistically schedule aircraft, crews and connections.
But from a pilot viewpoint, the big three above seem to be what I most frequently encounter. So, in addition to packing your own food and water in your carry-ons, be sure to arrive at your departure airport with a plentiful supply of patience. This summer, you’ll need it it more than ever.
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I get it: flight delays are frustrating for passengers. A hundred sixty-some people want information, they want time estimates. They have connections to make, events scheduled–and for whatever reason, the flight is late.
Two scenarios determine what I can do. On the ground? Easy: brakes parked, we wait. I give updates at least every 30 minutes on the ground, usually more often. We’re not moving, we’re not burning fuel–I have plenty of time and attention to give passengers. Here’s me in that situation:
Sitting, waiting patiently, giving timely explanations over the PA. But in the air, it’s a different story. We’re burning fuel, which is literally eating away at the time we can stay aloft. We’re in a flow of traffic, meaning we have jets both ahead and behind us on our route and we have speed and altitude constraints: can’t speed up because we’ll close on the aircraft ahead of us (“Can we make up time in the air?” Probably not, and that’s why). We have ever-changing weather both along our route and at our destination and our alternates. When we’re sent to a holding pattern, here’s me:
I’m conducting a multi-piece orchestra that includes Air Traffic Control, flight dispatch, and our jet to include route, fuel burn, alternates, alternate weather, enroute weather, holding pattern both position and altitude (as we go lower, the fuel burn increases and thus our range and endurance decreases), and the aircraft ahead of and behind us in holding, which is in reality above and below us.
Now is not a good time to tap the conductor on the shoulder and ask, “Are we there yet?”
I can’t say what other major carriers do, but on American Airlines flights, your cockpit crew has the latest greatest technology to provide real-time information and communication. The airline has always been a leader in advanced flight deck technology (first to have both comprehensive terrain warning and windshear predictive weather avoidance guidance) and in the last year, has added live-streamed WSI animated weather radar to the cockpit assets:
Virtually at my fingertips is the combined radar, turbulence warnings, severe weather depictions, storm tops, and direction of movement, in real-time, animated, thanks to dedicated flight deck WIFI. We already had one of the most advanced radars ever built on our aircraft, which gives details out as far as 300 miles (I find it most useful at 160 mile range), but now we can look two hours down our route, see what’s developing and if prudent, request a different route clearance to keep the ride smooth and efficient.
In the terminal area, on board radar does an excellent job of tuning itself and, because it has GPS positioning, it screens out terrain features that might appear as false weather echoes.
Once assigned holding, our cockpit workload includes the pattern itself (we always ask for longer legs to limit turns that burn gas and aren’t as comfortable for passengers. We’re given an Expected Further Clearance time (EFC on the display below):
So we can begin the fuel calculations to determine how long we can hold before we must divert. Here’s a definition for you: Bingo Fuel is the minimum total fuel we can have before we must either proceed to our destination or divert. For example only, let’s say 5,000 pounds of fuel is what we want to be on the deck with.
To determine Bingo Fuel, we start with the total we must have on the ground at either our destination or our divert alternate. Add to that the amount of fuel it takes to get to your alternate, which is a different amount from that which would be burned if you diverted from the holding pattern rather than from an approach at your destination.
My airline has instantaneous navigation and fuel computations at our fingertips:
Here is the fuel I’ll land with if I divert to Philadelphia, leaving holding now (the “D” after KPHL means “directly from holding”) which is 13.2 (13,200 pounds of fuel). Subtract 5.0 Bingo Fuel and that leaves 8,000 pounds available until we either have to land at our destination or alternate. Why is JFK arrival fuel less when it’s actually closer to our destination Newark? Because we’re holding well south of New York, so Philly is closer.
But there’s more to consider. What’s going on at Philly? Once again, our state-of-the-art cockpit resources have instant answers:
A touch of the screen brings up current conditions at our destination and alternate. But there’s still another fuel consideration: how do I preserve Bingo Fuel after leaving holding and flying to the destination and completing the approach–then diverting? That number will be different depending on where you’re holding in relation to your destination, plus where your alternate is in relation to your destination. That’s signified by the “M” after the airfield, instantly calculated by our nav system:
Of course, that number will be more restrictive because of the fuel burn required from our holding pattern location and our destination. The two figures (M and D) must be constantly monitored to be sure the M option is even possible, but there’s a catch: as you descend in the holding pattern, fuel burn will increase–and all of those fuel figures will change.
So, the conductor (captain) is sorting constantly changing data streams and at the same time, communicating with Air Traffic Control and Flight Dispatch but there’s a third stream that’s complex and must also be tacitly monitored: what are other jets doing? If those ahead of us get a further delay, we know we will too. If someone diverts, where are they going, because if too many go to that airport, there may be further holding.
What’s the ever-changing weather doing at our selected alternates and if needed (fairly typical), let’s set up numbers and weather for another divert alternate. Can we extend our holding based on the proximity of another suitable alternate?
What approach are they using in real-time at both our destination and our alternate, and what is happening in real-time at our destination? If we can split our attention seven ways (Air Traffic Control, Dispatch, weather, fuel burn, destination and alternate weather), we can monitor the destination approach control frequency and see how long the final pattern (think: fuel burn) is so as to determine a more realistic enroute and approach burn to preserve the ironclad Bingo number.
Given all of that information coming in, communications going out, calculations being done and ever-changing, plus flying the 70 ton jet smartly, safely and efficiently–this is not a good time to tap the conductor on the shoulder and ask, “are we there yet?”
I’ll make a PA when we’re released from holding, or if we divert. But now that you are aware of what’s actually happening during a very routine airborne holding pattern, you can understand why I barely have time to drink my already cold airplane coffee, much less talk on the PA. We have the absolute best inflight equipment in the airline industry and the tightest, most consistent crew coordination in the world, so now is the time to let us work for you.
Rest assured that we’re doing everything humanly possible to get you safely to our destination.