NTSB Identification: ANC83IA089.
The docket is stored on NTSB microfiche number 23795.
Incident occurred Wednesday, June 01, 1983 in MEKORYUK, AK
Aircraft: BOEING VERTOL 234ER, registration: N234BV
Injuries: 19 Uninjured.

NTSB investigators used data provided by various sources and may not have traveled in support of this investigation to prepare this aircraft incident report.

WHILE CLIMBING IN IFR CONDITIONS AFTER TAKEOFF, THE #1 ENG LOST POWER. THE PLT DUMPED FUEL & LANDED ON AN OIL EXPLORATION PLATFORM. WHILE DUMPING FUEL, THE #1 JETTISON SYS OPERATED NORMALLY, BUT THE CIRUIT BREAKER POPPED ON THE #2 SYS. THE AIRCREW RESET THE CIRCUIT BREAKER & WERE ABLE TO OPEN THE VALVE, BUT THE CIRCUIT BREAKER POPPED AGAIN. THEY WERE ABLE TO CLOSE THE #2 JETTISON VALVE BY HOLDING THE CIRCUIT BREAKER IN. AN INVESTIGATION REVEALED THAT THE LOWER ACCESSORY LEVEL GEAR, PN 2-070-024-01, IN THE #1 ENG, HAD FAILED.

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

ACCESSORY DRIVE ASSY..FAILURE,TOTAL



Contributing Factors

FUEL SYSTEM,FUEL JETTISON SYSTEM..FAILURE,PARTIAL



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