If the system is similar to that on other aircraft (Airbus) then there is no need to switch the GPWS system off, unless for a specific non-routine reason. The fault lights are not that interesting to me on the ground, the off light all the more(thanks for pointing that out A Floor). Again, assuming that the system is similar to what I know.
Anyway, we will have to wait a few months or years for the investigation. Very sobering pictures.
I have no knowledge of this aircraft systems but the fault lights for TAWS maybe a normal indication with the IRS/ADIRU (insert equivalent) system turned off on the ground.
I am aware of that, the external power may have just been applied to the aircraft which meant the TAWS computer would still have been booting when the pic was taken, but that would not explain why the TERR function was switched off.... as far as I know, this is not normally done. The picture was also taken today, the 9th of May.
"The leading-edge technologies, being the core ingredient of the Sukhoi Superjet 100 Project, penetrate its every stage – from design and development to final assembly, delivering a modern, economically efficient and globally marketable aircraft. "
Being as there are/were great hopes to make a new BRIC based multinational aviation project, this incident couldn't come at a worse moment, irrespective of the fatalities, eventual causes, ?human? errors.
Next after the initial quake will come the tsunami of speculation and disinformation.
I suppose I can only throw out the suggestion of disgruntled employee sabotage or opposition sabotage. Definitely not what I'd expect from this crew. Have met both members of the flight deck of this crash a few months back, both solid pilots, I wouldn't jump to questioning their ability. Have been on a Sukhoi SJET test flight - a sturdy craft indeed. I think we need to shy away from the usual 'Russian plane - it was bound to crash' and blaming ATC. I suggest some interesting things will come out of the investigation to follow.