May 4, 2016
Accident
Substantial Arlington, WA
InjuriesNone
Phase of Flight-
ConditionsVMC
OperationFAR 091
Probable Cause
The pilot's failure to adequately secure the aircraft while manually starting the engine from outside the cockpit, which resulted in the unmanned aircraft becoming airborne and colliding with a hangar roof.
NTSB GAA16CA216