- Date
- June 30, 1990, 11:30 local (19:30 UTC)
- Place
- Beaver Village, AK
- Injuries
- 1 minor, 8 uninjured
- Damage
- Substantial damage
- Phase of flight
- Enroute
- Aircraft
- N17689De Havilland DHC-3
- Weather
- Visual (VMC) · Day
- Status
- Completed · report October 20, 1992
- Report
- Approved by Office Director
- NTSB office
- Alaska Regional Office
- FAA report
- 19900630023029A
- Case key
- 5393
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
Probable cause
Mechanical failure of an exhaust rocker arm.
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
The pilot reported a substantial loss of power while in cruise flight. He was unable to maintain altitude and the aircraft crashed into trees. An examination of the recently overhauled engine revealed a fractured exhaust rocker arm that caused the loss of power.
Aircraft
- Registration
- N17689
- Reported as
- De Havilland DHC-3
- Category
- Airplane
- Serial number
- 431
- Airframe hours
- 7,111
- Engine
- P&W R-1340, 600 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Part 135
- Registered owner
- Wright Air Service
- Airworthiness certificate
- Standard, Normal
- Last inspection
- 100 hour · June 27, 1990 · 9 hours before
- Departed
- FAI · Fairbanks, AK
- Destination
- ARC · Arctic Village, AK
- Flight plan
- VFR
- Airport
- NONE
Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.
Flight crew
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 38
- Certificate
- Airline transport
- Airplane ratings
- Single-engine land, Single-engine sea, Multi-engine land
- Instrument ratings
- Airplane
- Medical
- Class 1, Valid Medical--w/ waivers/lim
- Seat
- Left
- Flight hours
- 8,400 total · 165 in this make and model · 8,200 as pilot in command · 20 in the last 90 days · 15 in the last 30 days · 10 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 70° at 8 knots
- Visibility
- 50 statute miles
- Lowest ceiling
- None
- Temperature
- 70 °F
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.
Other investigations on N17689 · 1
Matched to the same aircraft by N-number and date.