MINR · BOEING A75N1(PT17) · 2021-05-26 · Hollister, CA, USA
Event
NTSB number
WPR21LA208
Event ID
20210527103156
Type
Accident
Date
2021-05-26
Location
Hollister, CA, USA
Coordinates
36.955489, -121.46791
Injuries
Highest injury
MINR
Fatal
0
Serious
0
Minor
2
Uninjured
0
Total aboard
2
Aircraft
Make
BOEING
Model
A75N1(PT17)
Registration
N75016
FAR Part
091
Engines
1
Damage
SUBS
Conditions
Light
DAYL
Weather
VMC
Probable cause
The improper installation of a relief valve spring that was shorter than the standard spring length, which slowed the response of the propeller governor to change the pitch of the blades during climbout, resulting in a partial loss of power.