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June 1, 1983 · Boeing Vertol 234ER · N234BV
Mekoryuk, AK
Overview
Report Status
Preliminary report
Event Type
Incident
Date
June 1, 1983
Injury Outcomes
No injuries (19 uninjured)
Location
Mekoryuk, AK
Aircraft
Boeing Vertol 234ER
Tail Number
N234BV
Operator
Atlantic Richfield
Injuries
None
NTSB Number
ANC83IA089
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.
Full Narrative
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.
Flight
Event TypeIncident
Event Time11:58 AHDT
Nearest Airport0nm
Runway0
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBoeing Vertol 234ER
Tail NumberN234BV
Aircraft CategoryHeli
OperatorAtlantic Richfield
Operating RulePart 91
Engines2
Engine TypeTurboshaft
Engine DetailsLycoming · AL5512 · Turboshaft · 4075
Seats19
People & Injuries
Injury SummaryNo injuries (19 uninjured)
Fatal0
Serious0
Minor0
Uninjured19
Total19
Crew 1Age 33 · First Class
Conditions
ConditionsIMC
LightDaylight
Wind290° @ 4 kt
CeilingOvercast 300 ft
Temperature / Dew Point39 C / 34 C
Altimeter0
Weather SourcePILO