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FILE DATE LOCATION AIRCRAFT DATA INJURIES FLIGHT PILOT DATA
F S M/N PURPOSE
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3-4182 77/12/20 NR.BILLINGS,MT BELL 47G3B1 CR- 0 0 1 NONCOMMERCIAL AIRLINE TRANSPORT, AGE
TIME - 1500 N7860S PX- 0 0 2 BUSINESS 45, 17500 TOTAL HOURS,
DAMAGE-DESTROYED OT- 0 0 0 700 IN TYPE, NOT
INSTRUMENT RATED.
DEPARTURE POINT INTENDED DESTINATION
BILLINGS,MT LOCAL
TYPE OF ACCIDENT PHASE OF OPERATION
PROPELLER/ROTOR FAILURE: MAIN ROTOR IN FLIGHT: NORMAL CRUISE
HARD LANDING LANDING: POWER-OFF AUTOROTATIVE LANDING
PROBABLE CAUSE(S)
ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: OTHER
MISCELLANEOUS ACTS,CONDITIONS - IMPROPER CLEARANCE-TOLERANCE
MISCELLANEOUS ACTS,CONDITIONS - EXCESSIVE-WEAR/PLAY
MISCELLANEOUS ACTS,CONDITIONS - IMPROPERLY INSTALLED
PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
UNUSUAL NOISE
REMARKS- ATTMTD AUTOROTATION DUE LOUD NOISE. COLLECTIVE WAS INOP. WRONG TRANSMISSION INSTALLED.
