b. I think the ‘voice recorder’ data is gone. It was a 15+ hour flight. I don’t know how long the flight recorder data stays in the system. It would have the most information regarding this event.
c. I do not know if the aircraft reports the event automatically by ACARS or other means.
Maybe it's something I don't understand about non-Western airlines, but surely as a captain or a pilot for Air India, you would know if your flight information was recorded and downloaded by ACARS/datalink/QAR? Or is there no such thing in India?