OK, let's pretend for a second that "PULL" is heard in the audio.
Soooo what? We already know it was going in at 45deg+ at the ground and crashed. Is there any other contributing element or clue to the crash that such a discovery might offer?
Still, at 30,000fpm descent rate (I think it was higher on the graph) that gives you roughly 500 feet per second.
First GPWS sounds off at what, 1000'?
You're honestly telling me that 3591 happened to key the mic during the exact TWO SECONDS before impact when you might be able to hear a GPWS call? Sure the data is rough, but even if you pad the numbers 200% they are still absurd.
If the plane was diving almost straight down, (which seems to be the consensus) surely we would EXPECT the GPWS to sound.
Or am I missing something.
I wrote that after you had posted, but people are forgetting the extreme descent rate of the aircraft just before impact. I'm not sure what type of GPWS this plane had, but I don't think any activate before 1000', but I'm not sure - data is sketchy.
Based on the descent rate and VS of the crash aircraft, from the time GPWS would make its first call-out, to the time of impact, would be a couple seconds (2 seconds if you go off 30kFPM). The odds of a mic being keyed (for the first time since the flight was over the ocean) during that instant, is incredibly unlikely.
In fact it takes a while for the system to repeat itself and finish the aural warning anyways, probably 3 seconds or so?
EDIT - Gr, I'm ignoring the descent rate mode for the GPWS and EGPWS (was this aircraft fitted eith EGPWS?) which may have given the system time to repeat "SINK RATE, PULL UP" as the descent rate reached the threshold for a few seconds longer. STILL not very long though.
Last edited by estorilm
on Mon Feb 25, 2019 8:19 pm, edited 2 times in total.