NONE · SIKORSKY S-58BT · 1990-07-16 · OVANDO, MT, USA
Event
NTSB number
SEA90LA137
Event ID
20001212X23835
Type
Accident
Date
1990-07-16
Location
OVANDO, MT, USA
Coordinates
47.069293, -113.040496
Injuries
Highest injury
NONE
Fatal
0
Serious
0
Minor
0
Uninjured
1
Total aboard
1
Aircraft
Make
SIKORSKY
Model
S-58BT
Registration
N439DS
FAR Part
133
Engines
2
Damage
SUBS
Conditions
Light
DAYL
Weather
VMC
Probable cause
THE PILOT DID NOT MAINTAIN ROTOR RPM AFTER A COMPRESSOR ASSEMBLY BLADE FAILURE. A RELATED FACTOR WAS AN INADEQUATE AUTOROTATION RESULTING IN A HARD LANDING.