- Date
- June 1, 1983, 12:58 local (20:58 UTC)
- Place
- Mekoryuk, AK
- Injuries
- 19 uninjured
- Damage
- No damage
- Phase of flight
- Enroute
- Aircraft
- N234BVBoeing Vertol 234ER
- Weather
- Instrument (IMC) · Day
- Status
- Completed
- Report
- Approved by Office Director
- NTSB office
- Alaska Regional Office
- Case key
- 4089
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the incident.
On this page
Sequence of events
NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.
Analysis
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.
Aircraft
- Registration
- N234BV
- Reported as
- Boeing Vertol 234ER
- Category
- Helicopter
- Serial number
- MJ016
- Airframe hours
- 99
- Engine
- Lycoming AL5512, 4,075 horsepower, turbo shaft
- Damage
- No damage
- Flight
- Business · Part 91 subpart F
- Operator
- Atlantic Richfield Co.
- Registered owner
- 234 I Inc.C/O Boeing Vertol
- Airworthiness certificate
- Standard, Transport
- Last inspection
- Continuous airworthiness · May 29, 1983 · 9 hours before
- Departed
- 708 · Bering Sea, AK
- Destination
- OME · Nome, AK
- Flight plan
- IFR
Flight crew
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 33
- Certificate
- Airline transport
- Airplane ratings
- Multi-engine land, Single-engine land
- Instrument ratings
- Helicopter, Airplane
- Medical
- Class 1, Valid Medical--w/ waivers/lim
- Seat
- Right
- Flight hours
- 3,990 total · 30 in this make and model · 30 in the last 90 days · 4 in the last 24 hours
Weather
- Conditions
- Instrument (IMC) · Day
- Wind
- 290° at 4 knots
- Lowest ceiling
- 300 ft overcast
- Temperature
- 39 °F, dew point 34 °F