Aug 2, 2015
Accident
Substantial Hubbard, OR
InjuriesNone
Phase of Flight-
ConditionsVMC
OperationFAR 091
Probable Cause
A severe propeller vibration due to the pilot's improper installation of the propeller spacer assembly, which necessitated an engine shutdown, an off-airport landing, and a collision with a sprinkler system.
NTSB WPR15LA228