NTSB Identification: ANC74AA009
14 CFR Part 135 Nonscheduled operation of ALASKA HELICOP
Aircraft: HILLER ACFT UH12L4, registration: N90470----------------------------------------------------------------------------------------------------------------------------
FILE DATE LOCATION AIRCRAFT DATA INJURIES FLIGHT PILOT DATA
F S M/N PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2982 73/7/17 NR.JUNEAU,ALAS HILLER ACFT UH12L4 CR- 0 0 1 COMMERCIAL COMMERCIAL, AGE 24, 2426
TIME - 1000 N90470 PX- 0 0 2 AIR TAXI-PASSG TOTAL HOURS, 840 IN TYPE,
DAMAGE-SUBSTANTIAL OT- 0 0 0 NOT INSTRUMENT RATED.
DEPARTURE POINT INTENDED DESTINATION
JUNEAU,ALAS LOCAL
TYPE OF ACCIDENT PHASE OF OPERATION
PROPELLER/ROTOR FAILURE: MAIN ROTOR TAKEOFF: VERTICAL
ROLL OVER LANDING: LEVEL OFF/TOUCHDOWN
PROBABLE CAUSE(S)
ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: OTHER
MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
TERRAIN - ROUGH/UNEVEN
EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
FIRE AFTER IMPACT
REMARKS- TORSIONAL COUPLING HOUSING FAILED,ORIGIN UNDET.
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