NTSB Identification: BFO91DOA01.
The docket is stored on NTSB microfiche number 44154.
Accident occurred Monday, July 01, 1991 in IAEGER, WV
Probable Cause Approval Date: 03/31/1993
Aircraft: BELL UH-1B, registration: N91348
Injuries: 1 Minor.

THE PILOT WAS DOING AN AERIAL SPRAY OF A WOODED AREA WHEN THE LOW RPM WARNING SOUNDED. HE THEN NOTICED THE ROTOR/ENGINE RPM READING WAS DECREASING RAPIDLY. THE PILOT DID AN AUTOROTATION DESCENT. DURING THE LANDING THE ACFT STRUCK TREES AND THEN IMPACTED THE GROUND. THE ACFT CAME TO REST ON ITS LEFT SIDE. THE EXAMINATION OF THE ACFT DID NOT DISCLOSE EVIDENCE OF MECHANICAL MALFUNCTION.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

THE LOSS OF ENGINE POWER FOR UNDETERMINED REASONS, WHILE OPERATING OVER UNSUITABLE TERRAIN.

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