NTSB Identification: ANC89LA007.
The docket is stored on NTSB microfiche number 37478.
Scheduled 14 CFR
Accident occurred Monday, October 10, 1988 in PERDE BAY, AK
Probable Cause Approval Date: 09/11/1989
Aircraft: CESSNA 207, registration: N9965M
Injuries: 5 Uninjured.

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

THE PILOT EXPERIENCED A POWER LOSS DURING CRUISE FLIGHT AND DURING HIS DESCENT THE ENGINE STOPPED PRODUCING POWER. HE LANDED ON THE TUNDRA AND THE AIRPLANE WAS SUBSTANTIALLY DAMAGED. AN ENGINE TEARDOWN REVEALED THAT THE NUMBER 4 PISTON WAS BURNED PAST COMPRESSION RING, WHICH PRESSURIZED THE CASE AND FORCED THE OIL OUT. THE ENG THEN SEIZED.

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

ENGINE ASSEMBLY,PISTON..BURNED

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

FLUID,OIL..EXHAUSTION


Contributing Factors

TERRAIN CONDITION..TUNDRA


Contributing Factors

TERRAIN CONDITION..ROUGH/UNEVEN

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