# NTSB ANC82DA083: Cessna 207A, N76078, Near Kipnuk, AK, September 5, 1982

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: September 5, 1982, 11:45 local (19:45 UTC)
- Place: Near Kipnuk, AK
- Coordinates: 59.929584, -164.059722 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=59.9296&lon=-164.0597&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report September 5, 1983
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 71881
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC82DA083
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/71881/pdf
- Page: https://openairdocs.org/ntsb/ANC82DA083

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Loss of engine power(partial) - mech failure/malf, cruise - normal
  - engine assembly,crankcase - cracked (cause)
  - fluid,oil - leak (cause)
  - fluid,oil - exhaustion (cause)
  - precautionary landing - initiated, pilot in command
- Loss of engine power(total) - mech failure/malf, approach - vfr pattern - final approach
- Forced landing, landing - flare/touchdown
- Nose over, landing - flare/touchdown
  - terrain condition - rough/uneven (contributing factor)
  - terrain condition - soft (contributing factor)
  - terrain condition - wet (contributing factor)

## Analysis

THE PILOT REPORTED THAT THE AIRCRAFT LOST OIL PRESSURE WHILE HE WAS IN NORMAL CRUISE. SHORTLY THEREAFTER, THE ENGINE BEGAN RUNNING ROUGH. THE ENGINE FAILED COMPLETELY WHILE HE WAS ON AN APPROACH FOR A FORCED LANDING. SHORTLY AFTER TOUCHING DOWN ON UNEVEN, SOFT, WET TUNDRA, THE AIRCRAFT NOSED OVER. AN INVESTIGATION REVEALED THERE WAS A CRACK IN THE ENGINE CRANKCASE, PN 633412, WHERE OIL HAD LEAKED OUT. A TEARDOWN OF THE ENGINE REVEALED EVIDENCE OF OIL EXHAUSTION. THE PILOT REPORTED THAT THERE WAS AMPLE OIL WHEN HE CHECKED IT PRIOR TO TAKEOFF.

## Aircraft

- Registration: [N76078](https://openairdocs.org/deregistered/N76078-1984-11-19), registration cancelled 1984-11-19, S/N 20700664 (OpenAirDocs)
- Reported make and model: CESSNA 207A
- Registry model: [Cessna 207A](https://openairdocs.org/model/cessna-207a) (registry code 2073604) (OpenAirDocs)
- Category: Airplane
- Serial number: 20700664
- Airframe hours: 1957
- Engines: CONTINENTAL IO-520-F 300 horsepower reciprocating
- Damage: Substantial damage
- Flight: Part 135
- Operator: Bethel Ventures,Inc.
- Registered owner: Bethel Ventures,Inc.
- Departed: C, BETHEL, AK
- Destination: C, KIPNUK, AK
- Flight plan: VFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 25; commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; flight hours: 1,225 total, 232 in this make and model, 1,060 as pilot in command, 231 in the last 90 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Visibility: 30 statute miles
- Temperature: 131 °F

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19820905044169A](https://openairdocs.org/incident/19820905044169A), Sep 5, 1982: Cessna 207A, Kipnuk, AK, Substantial damage. Crashed occurred during emergency landing after engine failure.

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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