4 ms·

Or a mechanical failure

by chupchap 1y ago

Spooky23 1y ago
Serious question: why is it so difficult to fathom that a deranged pilot could decide to commit suicide by plane?
- shash 1y ago
  Not difficult, but can you close an investigation on that note without going over other possibilities? What if there's another safety lesson to be learnt here?
  - Spooky23 1y ago
    The investigation isn’t closed. A preliminary report is usually required to be released within a few weeks of an incident.
- ExoticPearTree 1y ago
  To answer your question: because it is a very rare occurence.
  - cjbprime 1y ago
    It's not that rare, and there are institutional factors (such as seeking treatment for psychosis being career-ending for a pilot) that incentivize serious pilot mental health crises being untreated.
  - BurningFrog 1y ago
    All commercial plane crashes are very rare occurrences.
ceejayoz 1y ago
Both switches, at slightly different times? Seems pretty unlikely.
- userbinator 1y ago
  A rodent chewing on wires. Vibration-induced chafing. Tin whiskers causing an intermittent short. There are many possibilities, those came to mind first.
  - apical_dendrite 1y ago
    We know that the switches physically moved from the run to the cutoff position because one of the pilots noted that they were in the wrong position. We know that they were moved back to the run position because they found in that position. I don't understand how a short could explain that - it really seems like someone would have had to physically move the switches.
    - fyrn_ 1y ago
      Do we know that the pilot noticed they were in the wrong physical position, or did some other status indicate the engie fuel had been cut? I would be surprised if there was only one channel for this information
      - shash 1y ago
        In the last mentour pilot livestream, they showed the simulator and both engines, and there's a little graphic near the cutoffs showing engine state and performance. Also, in _this_ livestream as soon as the report was released, Ben mentions in response to a question that if you cut off the engine, a lot of electrical systems are going to face power cuts, so there will be alarms blaring all over the cockpit. So, yes. There are many channels of information here.
    - shash 1y ago
      What we have is reported speech: "In the cockpit voice recording, one of the pilots is heard asking the other why did he cutoff. The other pilot responded that he did not do so." So we don't know the exact words used. Did he say for example, "Why did you move the switches to cutoff" or did he ask "Why did you cut off the engines"? If there are indeed two shorts (astronomically low as those probabilities are), the other pilot would say "I didn't", look around confused and then (possibly?) flip both of them down and back up? Which could explain the 4s delay in pulling them back up. Speculation, but since we do not have actual transcripts or recordings, all I'm doing is answering speculation with more speculation.

Or a mechanical failure

Spooky23 1y ago

Serious question: why is it so difficult to fathom that a deranged pilot could decide to commit suicide by plane?

shash 1y ago
Not difficult, but can you close an investigation on that note without going over other possibilities? What if there's another safety lesson to be learnt here?
- Spooky23 1y ago
  The investigation isn’t closed. A preliminary report is usually required to be released within a few weeks of an incident.
ExoticPearTree 1y ago
To answer your question: because it is a very rare occurence.
- cjbprime 1y ago
  It's not that rare, and there are institutional factors (such as seeking treatment for psychosis being career-ending for a pilot) that incentivize serious pilot mental health crises being untreated.
- BurningFrog 1y ago
  All commercial plane crashes are very rare occurrences.

ceejayoz 1y ago

Both switches, at slightly different times? Seems pretty unlikely.

userbinator 1y ago
A rodent chewing on wires. Vibration-induced chafing. Tin whiskers causing an intermittent short. There are many possibilities, those came to mind first.
- apical_dendrite 1y ago
  We know that the switches physically moved from the run to the cutoff position because one of the pilots noted that they were in the wrong position. We know that they were moved back to the run position because they found in that position. I don't understand how a short could explain that - it really seems like someone would have had to physically move the switches.
  - fyrn_ 1y ago
    Do we know that the pilot noticed they were in the wrong physical position, or did some other status indicate the engie fuel had been cut? I would be surprised if there was only one channel for this information
    - shash 1y ago
      In the last mentour pilot livestream, they showed the simulator and both engines, and there's a little graphic near the cutoffs showing engine state and performance. Also, in _this_ livestream as soon as the report was released, Ben mentions in response to a question that if you cut off the engine, a lot of electrical systems are going to face power cuts, so there will be alarms blaring all over the cockpit. So, yes. There are many channels of information here.
  - shash 1y ago
    What we have is reported speech: "In the cockpit voice recording, one of the pilots is heard asking the other why did he cutoff. The other pilot responded that he did not do so." So we don't know the exact words used. Did he say for example, "Why did you move the switches to cutoff" or did he ask "Why did you cut off the engines"? If there are indeed two shorts (astronomically low as those probabilities are), the other pilot would say "I didn't", look around confused and then (possibly?) flip both of them down and back up? Which could explain the 4s delay in pulling them back up. Speculation, but since we do not have actual transcripts or recordings, all I'm doing is answering speculation with more speculation.