Jul 21, 2003
Accident
Substantial Henry's Lake, ID
InjuriesNone
Phase of Flight-
ConditionsVMC
OperationFAR 091
Probable Cause
A set of inadequately torqued vacuum pump retaining nuts, leading to the failure of the vacuum pump gasket, resulting in oil exhaustion, which resulted in a loss of engine power during cruise. A ditch and rough uneven terrain were factors.
NTSB SEA03LA146