Air India 787 Crashes in Western India

[Larry in TN]

Schrödinger's switches. OK, maybe that's a bad analogy (or maybe not, or maybe it both is and is not). Without video or some other evidence, like a suicide note, I don't think we really can ever know for certain who did what.

The sound of the switches being moved can be verified on the CVR and the time index compared with the DFR indication of the switch position.

Each engine has its own independent systems and control logic. Each switch also has independent sets of contacts, one contact that controls the fuel valves and another that sends position signals used for recording and indicating the switch status to the FDR and cockpit systems. The same, extremely unlikely, fault would have to have independently occurred in both, separate systems, on both separate engines, about one second apart, if those switches weren't physically moved, to produce both the indications on the FDR and the to cause the engines to lose power.

 

[3393RP]

At the personal level, suicide is an inexplicable tragedy. Some of us have been very close to that and all I can tell you from my humble point of view is that it is not easy to fathom or to cope with.

My happy, intelligent, and loving sixteen year old nephew committed suicide eight years ago. There were no outward signs he was in distress.

I don't think of it quite as often now, but it is still hard to deal with. My heart breaks for my sister-in-law and her pain, she found his shattered body.

 

[DaleB]

The sound of the switches being moved can be verified on the CVR and the time index compared with the DFR indication of the switch position.

OK, great! We can know that the switches were actually physically flipped by someone.

Each engine has its own independent systems and control logic. Each switch also has independent sets of contcts, one contact that controls the fuel valves and another that sends position signals used for recording and indicating the switch status to the FDR and cockpit systems. The same, extremely unlikely, fault would have to have independently occurred in both, separate systems, on both separate engines, about one second apart, if those switches weren't physically moved, to produce both the indications on the FDR and the to cause the engines to lose power.

Wonderful to know - it's almost like the Boeing engineers had done this kind of thing before.

 

[bonefishpete]

DT

 

[bonefishpete]

June 11 (Reuters) - Indian investigators are expected to delay issuing a ‌final report into a deadly Air India Boeing (BA.N), opens new tab 787 crash by the one-year anniversary on Friday, citing the need to complete an analysis of the plane's engines, according to a source with knowledge of the matter.