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remi
July 11, 2025, 23:22:00 GMT permalink Post: 11919986 |
to add
In my airline (we don\x92t fly the 787 but our engine masters are in a near identical position on our jet) we have had *multiple* incidents of engine masters being manipulated accidentally in flight. This has involved both flight deck and cabin crew. This has meant a re-emphasis on SOPs regarding the centre pedestal but you still routinely see this broken on the line in minor and major ways from time to time I don't think it's ridiculous to suggest that perhaps one crew intended to manipulate a different control (stab trim cutout?) and flipped the fuel cutoff instead, maybe not even realizing what has happened. Sure, unlikely, but essentially every aspect of airline accidents is unlikely. Subjects (links are to this post in the relevant subject page so that this post can be seen in context): Fuel (All) Fuel Cutoff Fuel Cutoff Switches |
remi
July 12, 2025, 21:17:00 GMT permalink Post: 11920838 |
I believe the *inspection* was not conducted, and whether there was a fault with the configuration of the switch on the accident aircraft is not answered in the report. If pilots were able to move this aircraft's cutoff toggles without lifting them, it seems that might have been reported at some point during its service. But then again, maybe the difference in operation between a correctly configured switch (requires lift to toggle) and incorrectly configured one (does not require lift, but lifting it still works as expected) is not noticeable. I'd be curious to know if India Air has (finally) inspected these switches in their fleet since the accident. Subjects (links are to this post in the relevant subject page so that this post can be seen in context): FAA Fuel (All) Fuel Cutoff Fuel Cutoff Switches SAIB NM-18-33 |
remi
July 12, 2025, 21:37:00 GMT permalink Post: 11920852 |
Earlier today I watched Mentour Pilot's YouTube discussion, one of the things Petter said was "Brain fart of the century" regarding the erroneous selection of cut-off 3 seconds after leaving the ground. Somewhere else I saw this sort of thing described as a "Car keys put in the fridge" event.
I found my cellphone in a fridge once but someone else had put it in there "by mistake." 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 |
remi
July 12, 2025, 21:43:00 GMT permalink Post: 11920860 |
Yes, and it is mute on the actual mechanical status of the switches.
If there had been maintenance done on the switches I'm assuming that would have been noted in the initial report. So as far as I can tell the question of whether the switches were configured as intended and working correctly is so far unanswered in public reporting. Presumably they were exhibiting normal behavior as far as pilots observed. Subjects: None |
remi
July 13, 2025, 00:01:00 GMT permalink Post: 11920944 |
The first thing that occurred to me, after reading the report was, how human error (if that is the case), could be designed out of the system. Two such critical switches right under the engine controls almost looks like asking for trouble, if, for example, a brain fade activated those, instead of a gear up command. One way around that would be to have 2 factor authentication for safety critical functions, an are you sure ?. For example, two switches at the opposite ends of the panel, or similar.
Do you want to brake sharply on the freeway (Y/N)?__ Subjects (links are to this post in the relevant subject page so that this post can be seen in context): Human Factors |
remi
July 13, 2025, 06:04:00 GMT permalink Post: 11921041 |
This leaves the so-called 'muscle memory' and 'brain fart' theories. Those who work in the field of psychology can show quite clearly that we are all liable to seemingly inexplicable mistakes, both in normal life and in the cockpit.
MaybeItIs
wrote about the cerebellum and the cerebrum in his post 183, his words are very wise.
It could have been an intentional, malicious act, but I think, for now, "brain fart" or "extremely inappropriate reaction to perceived anomaly" makes more sense for now. Subjects (links are to this post in the relevant subject page so that this post can be seen in context): Action slip Muscle Memory |
remi
July 13, 2025, 06:10:00 GMT permalink Post: 11921044 |
* two pilots * zero pilots * one pilot Subjects: None |
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