More Questions Asked by Flight Crew Members Regarding AF 447

More questions have been raised by fellow safety minded pilots regarding AF Flight 447. Here are several:

1. Why were they flying through that nasty convective weather?

2. Why did the captain leave the cockpit just prior to the flight’s arrival to this area?

With respect to the questions asked, here is my take.

1. The captain had at least a 2 hour-old satellite pix by the time he started engines. The thunderstorm encounter occurred somewhere after about the second or third hour of flight, meaning that the AF 447 entered the thunderstorm area about four to five hours minimum after the satellite picture was taken. This means that it is very possible that the satellite picture that the captain received did not resemble the convective weather area that the flight eventually encountered enroute. This is assuming of course that the crew got a satellite pix at all out of Rio.  This is a very common pre-flight briefing problem for all airlines operating oceanic flights. Making the problem worse is that Flight Control is not required to resend the latest satellite shots to the crew during the flight.  Why is that? Why do we have rules that not only do not provide important weather information, but do allow the provision of somewhat inaccurate weather information? Why is that?

A. Let’s say that the captain was a cautious fellow and planned well. So he gets up a few hours before the hotel pickup, has a shower, checks his email, gets packed, dressed and meets the crew in the lobby. At the airport or maybe even at the hotel, he sees the satellite picture prepared and sent by AF Flight Control Dispatch Offices.

I have not seen a satellite pix or a weather observation from the time from 4-5 hours before the mishap, but if I was investigating this incident, that is the first place that I would look. Why? Well satellite picture is the information that will inform the captain as to what lies ahead of him and will inform his game plan, sleep strategy, crew switch strategy for the flight.  So my money is on a sat shot that shows widely scattered storms if any at all given to the captain during pre-flight briefings. He doesn’t see a threat at this time and doesn’t see any reason not to use his normal strategy of getting the oceanic clearance, getting the plane out onto the transoceanic tracks and then retiring to get some rest, letting the other crew members handle the routine of the crossing. This will allow him to get some sleep and be fresh when they get close to Europe and have to start their let down at CDG for landing. Maybe this is his normal routine. Based on this supposed scenario, it is a reasonable one.

B. Alternative scenario: The captain is a “show me” kind of guy; unless he sees the lightning flashes and is face to face with a thunderstorm, he doesn’t worry about the metro stuff, because it is all 4-5 hours old data by the time they get out onto the tracks for crossing.

Either way, I do not think that the captain foresaw that 60,000 ft+ inter tropical convergence zone storms in his path would be a real possibility.

Additionally, we might consider this: thunderstorms anywhere rise rapidly in height, developing at 2000-4000 feet per minute, even as much as 6000 feet per minute. Therefore, information such as “the previous flight got through this path” is not really all that valid information for following flights, especially flights following 10 to 15 minutes later.  The fact that another flight transited this area 10-15 minutes prior is certainly and in my opinion most definitely not an endorsement for safe flight in an area of active thunderstorm activity. Thunderstorms by their very nature are unstable. That is  what makes them so dangerous to flight. Thunderstorms violate the very first principle of aerodynamics, which says, “assume a homogeneous airmass.”  For sure a thunderstorm is not a homogeneous airmass!

Thunderstorm development in the inter-tropical convergence zone (ITCZ) is even more dynamic than at other places on the globe. This means that even more caution needs to be exercised in the ITCZ by commercial airline operations. Yet remember that this mishap occurred on a flight planned and operated regularly in the ITCZ by this airline.

C. Third scenario is this. This is the kind of fellow that does his own thing. He does the takeoff, then he does his nap, then he does his arrival. This is the way that he does things and this is his thing.  This is how he does every oceanic flight and he figures the other crew can handle things.  That is just the way he is.

D. Fourth possible scenario: The Air France Dispatch Office in CDG does not consider it their responsibility to update Air France flights with Air France passengers on board of dangerous weather that has developed and is now in the path of an Air France flight. They consider it their responsibility only to get the pre-flight paper work prepared and delivered and then do no further duties other than to stay awake and answer any questions that come up during the flight.

My guess is that AF Dispatch Flight Control Standard Operating Procedure SOP is not to initiate any inflight communications unless directed to do so by “higher authority” or some similar version of that idea. The second place that I would look were I doing the BEA investigation would be the AF Flight Control Log for AF 447, the AF Flight Control SOP and all of the metro data that was available to AF Flight Control before the mishap.

I would further examine just exactly how AF Flight Control does business every day and night with respect to how much info is passed to airborne flights concerning dangerous weather occurring ahead of any AF flight.

Sorry to say this but more than a few commercial flight crew members are like B and C. I am even more sorry to say that more often than not, many flight control offices are like D. They send company flights on flight paths that intersect dangerous weather and do not change plans along the way. My guess is that this most likely remains “the way things are” at many airlines. How about yours? Are you in a position to make some changes at your airline?

So that is some thoughts on question one. But if you are a good captain and a good communicator, my guess is that you also have a few ideas and I would be very interested in hearing from you and reading your thoughts on this same question.

Now for question two, here is what I think. I do not think that the captain was fully aware of what was ahead of him. I also do not think that the captain expected a failure on the pitot static system due to icing to occur if the flight did go into clouds.

Remember that the pitot static equipment manufacturer, France’s CAA, Airbus and AF all denied that the equipment was faulty, even though there had be several incidents of failure previously of this same equipment in this same scenario and that it had been reported in the industry press.

So that captain may have allowed himself to be informed by the “authorities” in lieu of informing himself through reading industry incident reports.

Again, there are plenty of crew members who allow themselves to be informed this same way, at airlines all over the world, pilots who do the same thing.

Those of us who doubt “authority” are few, probably less than 1/3 of all. My guess is that real doubters are even fewer than 1/3, more like 1/10!

So, here is a third question:  Why didn’t the captain jump back into his seat and take control as soon as he arrived back up front? I know that I would have. You? Sure things were confusing, alarms going off, icing, thunderstorms, panic-what better time for the captain to be in charge of the flight deck and the controls?

I hope that this mishap is eventually re-investigated by some board other than the BEA, a board that knows that they are doing a Safety Investigation and not a Legal Investigation for some future court proceedings.

In the meantime, I am blogging my thoughts to allow local safety managers around the world to think deeper about keeping their operation safe. That is my intent.

Keep in touch.

Published by Capt. Paul Miller

Aviation safety expert with 43 years in the sky

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