Final
1 fatal
Apr 26, 2024
N988B crash at Anaconda, MT
Bell 206-L4 — Loss of engine power (total) at Anaconda, MT
DateApr 26, 2024
Tail numberN988B
AircraftBell 206-L4 · Bell 206 JetRanger · B06T
LocationAnaconda, MT
Phase of flightInitial Climb
OperationPart 137 Aerial application
Injuries1 fatal
NTSB caseWPR24FA132
Probable cause
A total loss of engine power due to a loss of cooling oil to the turbine-to-compressor coupling shaft and subsequent fracture of the shaft at an altitude too low for the pilot to complete a successful autorotation. Contributing to the accident was carbon buildup in the piccolo tube screen and nozzles and the disintegration of the spur adapter gearshaft O-rings for reasons that could not be determined.
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