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AirScotia
July 09, 2025, 23:20:00 GMT permalink Post: 11918695 |
There has been discussion recently about a procedure that involves moving the fuel switches to CUTOFF and then back to RUN following a dual engine failure.
Attached is an image of a page from the Air India 787 Training Manual that discusses this procedure. I am submitting this without comment or opinion. ![]() Subjects (links are to this post in the relevant subject page so that this post can be seen in context): Dual Engine Failure Engine Failure (All) Fuel (All) Fuel Cutoff Switches RUN/CUTOFF Relight V1 |
AirScotia
July 10, 2025, 16:15:00 GMT permalink Post: 11919117 |
I don't think that message has been confirmed? Other reports have the pilot (identity not confirmed, I don't think?) just saying 'Mayday'.
Subjects (links are to this post in the relevant subject page so that this post can be seen in context): MAYDAY |
AirScotia
July 11, 2025, 22:42:00 GMT permalink Post: 11919937 |
If there was a jumpseater, would that be officially recorded before they took off, or is it more of a casual decision?
Subjects: None |
AirScotia
July 11, 2025, 22:49:00 GMT permalink Post: 11919947 |
As someone suggested, the person asking the question might have asked it to cover the fact that he had performed the action.
Subjects: None |
AirScotia
July 12, 2025, 09:45:00 GMT permalink Post: 11920438 |
The report says the pilots cleared a test for alcohol before flying. I presume that's a breath test of some kind?
This is a grisly question, but will there be physical evidence to test for drugs? As in, medications that should have been disclosed to Air India, or medications that were disclosed but were not taken. Subjects: None |
AirScotia
July 12, 2025, 10:17:00 GMT permalink Post: 11920457 |
On the closed Part 1 of this discussion, one poster said that there was a jumpseater - a cabin crew member who was learning to fly. This was never repeated or further discussed, and I couldn't work out if it was just conjecture. But it's stuck in my mind.
Subjects: None |
AirScotia
July 12, 2025, 12:33:00 GMT permalink Post: 11920583 |
The report doesn't say WHEN the pilots spoke to each other. The one doing the asking might have been speaking ten seconds after CUTOFF, simultaneously moving switches to RUN. Or, he may have asked soon after observing the other's action, and there was a several seconds' delay before getting an answer.
Subjects (links are to this post in the relevant subject page so that this post can be seen in context): RUN/CUTOFF |
AirScotia
July 12, 2025, 21:52:00 GMT permalink Post: 11920869 |
The fact that
SAIB: NM-18-33 was specifically mentioned, and that Air India's failure to inspect this airframe re the advisory was specifically mentioned, and that the exchange between the pilots specifically included wtte "I didn't", suggests to me that the report would like to hint at maintenance / build problems rather than deliberate pilot action.
Subjects (links are to this post in the relevant subject page so that this post can be seen in context): SAIB NM-18-33 Special Airworthiness Information Bulletin |
AirScotia
July 12, 2025, 22:37:00 GMT permalink Post: 11920895 |
that would surely involve a safety directive at this stage though?
I had posted before (and it had been deleted for some reason) that is appears as if air india is taking a substantial hit on their widebody capacity at the moment and keeps cancelling routes right now (the latest being LGW), could they be doing specific extra maintenance/ checks having more insight than almost any other stakeholders at this point? Subjects: None |
AirScotia
July 13, 2025, 10:46:00 GMT permalink Post: 11921220 |
Subjects: None |
AirScotia
July 13, 2025, 14:27:00 GMT permalink Post: 11921357 |
On the site that I maintain that covers this thread here:
https://paulross.github.io/pprune-th...171/index.html
I removed the subject that described deliberate action on the part of the pilot(s) for reasons I explained here:
Air India Ahmedabad accident 12th June 2025 Part 2
I would restore that subject if any hard evidence appears that suports that theory, not on the basis of speculation (and out of respect to the families and memories of the flight crew). For those thinking along those lines could I offer this challenge: All the civil aviation pilot suicide cases that I have heard about have been achieved by a rapid descent from cruising altitude. It is a pretty sure outcome. But to switch off the fuel just after takeoff, would you really expect that to succeed? Supposing the other pilot noticed and corrected this in one or two seconds rather than ten, then you would have failed. I'm not saying people intent on this behaviour are being rational but even by the laws of un-rationality it seems an unlikely way of trying to achieve your goal. There are only two parts of the flight where the PF's attention will be entirely focused in front of him - takeoff and landing. Cutting the fuel switches on landing is pointless - the plane will in all likelihood land safely as a glider. Above a certain altitude after takeoff, there will be time for the PF to recover the situation. Doing it as soon as the wheels have left the ground pretty much guarantees a crash. Doing it in cruise - FO off to the toilet etc. - it will be obvious which yoke was the one doing the pushing, unless of course you switched seats when your colleague left. The fuel switches are effectively anonymous. Subjects (links are to this post in the relevant subject page so that this post can be seen in context): Fuel (All) Fuel Cutoff Switches |
AirScotia
July 13, 2025, 19:03:00 GMT permalink Post: 11921538 |
No-one has discussed the concept of suicidal ideation, where a person may idly 'play' with ideas of how to end their life. If someone 'played' with the idea of how to end their life but make it look accidental, I think they might come up with a scenario such as this.
Ideation doesn't always result in an actual act, but if the thoughts came from life factors not being fully brought into consciousness, there may be a 'dream sequence' moment where they actually do the thing they've played with in their mind. It's not pre-planned or intentional, and the person who's acted out may not even be consciously aware they've done so. Subjects: None |
AirScotia
July 13, 2025, 19:45:00 GMT permalink Post: 11921579 |
I think what you're actually referring to are known as
intrusive thoughts
, not suicidal ideation. The former are generally normal and experienced even by the most sane and rational individuals. The key point in the cited reference is this: "In reality, a thought\x97even a very scary thought\x97is not an impulse." I'm not aware of any evidence that suggests that people act out intrusive thoughts -- even accidentally.
Subjects: None |
AirScotia
July 13, 2025, 20:06:00 GMT permalink Post: 11921597 |
I think what you're actually referring to are known as
intrusive thoughts
, not suicidal ideation. The former are generally normal and experienced even by the most sane and rational individuals. The key point in the cited reference is this: "In reality, a thought\x97even a very scary thought\x97is not an impulse." I'm not aware of any evidence that suggests that people act out intrusive thoughts -- even accidentally.
Subjects: None |
AirScotia
July 13, 2025, 21:26:00 GMT permalink Post: 11921676 |
Meaning no disrespect to pilots (indeed, quite the opposite), and admittedly I'm no psychologist, but it strikes me that to postulate that a pilot might cause the crash of a large aircraft because of suicidal thoughts is to
seriously understate the action taken
, because such action also means the likely death of all passengers and aircrew, presumably all or most of whom are perceived as innocent bystanders by the actor. Whatever term you want to apply to that action, it is far more and far worse than individual suicide, and I would think it needs a pretty substantial and convincing body of evidence, including psychological evidence, to explain.
I know such cases have happened (or may have happened, as in MH370), and perhaps cannot be excluded here with what we know at present, but I for one would be far more inclined to suspect something along the lines of the various "brain fart" possibilities that have been mentioned, absent further data. Subjects: None |
AirScotia
July 14, 2025, 11:11:00 GMT permalink Post: 11922092 |
May I just point out that the survivor's account of what he remembered seems to have been entirely accurate?
He heard a loud bang - RAT did deploy, and does do so with a loud bang. Green and white lights came on - very likely emergency lights Aircraft seemed to be struggling for height - it was Sudden roar of an engine - we know No. 1 powered up just too late A number of us here discounted what he said because he was traumatised and, you know, just a passenger. But he wasn't wrong about anything. Subjects (links are to this post in the relevant subject page so that this post can be seen in context): RAT (All) |
AirScotia
July 14, 2025, 12:12:00 GMT permalink Post: 11922145 |
Subjects: None |
AirScotia
July 14, 2025, 13:58:00 GMT permalink Post: 11922233 |
Having said the "Why have you" question was said in subservient manner, I'd implied it must have been the captain that cut the fuel. However, I'm profoundly puzzled by the fact that he would hardly leave his old dad alone since he was going to devote his life to him - and to do it in such horrific circumstances which his father might have fully comprehended.
While depressed people get lost in their thoughts, this would have been a total reversal of his caring nature. It's just another factor that just doesn't make sense. Subjects: None |
AirScotia
July 15, 2025, 08:50:00 GMT permalink Post: 11922750 |
Given the engines roaring, headphones etc. - would it have been possible for the PF to
hear
the switches being clicked?
Subjects: None |
AirScotia
July 15, 2025, 11:24:00 GMT permalink Post: 11922853 |
For the action slip theory, while worth of considering, I have one question. That is that both switches are reported to be moved to CUTOFF at practically the same time, quote "within 0.1 seconds". You can not move those switches one after the other in 0.1 seonds (grip one, pull it, move it, let loose , grip the other one ...).
Question: is it an often encountered practice when arriving at the stand, to shut-down both engines simultaneously? The switch design seems to try to prevent simultaneous action. But we are humans, right? Given sampling rates, it's been established here that this is anything up to 2 seconds. Subjects (links are to this post in the relevant subject page so that this post can be seen in context): Action slip Dual Engine Failure Engine Failure (All) RUN/CUTOFF |