Hello Richard, I am putting this out there as maybe there is a problem that exists and could be prevented....................
Unfortunately I had the same problem happen to me in the Air 3 minutes into first flight of the day full throttle with complete loss of aircraft,complete smoking hole!
I never had a shutdown problem on the bench while setting up radio, servos, gear,etc. ( probably had been on for 30 minutes or more)
Comp ARF Euro sport
jet central Rhino
Competition SRS with 4 satellite receivers
2- 6.6V 3000mah (fully charged with telemetry reading back perfectly)
DX9 fully charged ( after crash verified TX on my other plane worked fine)
previous Range check exceeded Mfg. minimum distance ( no loss of signal)