ASN Wikibase Occurrence # 297976
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| Date: | Tuesday 31 July 2018 |
| Time: | 22:00 LT |
| Type: |  Cessna A185F |
| Owner/operator: | |
| Registration: | N185KB |
| MSN: | 18503698 |
| Year of manufacture: | 1979 |
| Total airframe hrs: | 2547 hours |
| Engine model: | Continental IO-520-D |
| Fatalities: | Fatalities: 0 / Occupants: 4 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | White Mountain, Alaska -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Council, AK (K29) |
| Nome Airport, AK (OME/PAOM) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The private pilot was conducting a cross-country flight when he demonstrated a momentary zero-G maneuver, shortly after which the engine lost partial power. The pilot was unable to restore engine power and subsequently conducted a forced landing to tundra covered terrain, during which the airplane nosed over, resulting in substantial damage.
Postaccident examination of the airframe and engine revealed no anomalies that would have precluded normal operation; however, one engine exhaust valve exhibited signatures consistent with uneven excessive heat exposure, but no mechanical failure of the valve, therefore would not have resulted in a loss of power. It is unlikely that a momentary zero G maneuver would result in a partial power loss that could not be restored.
Probable Cause: A partial loss of engine power for reasons that could not be determined because postaccident examination of the engine revealed no mechanical malfunctions or failures that would have precluded normal operation.
Accident investigation:
 |
|
Sources:
NTSB ANC18LA059
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 15-Oct-2022 11:17 | ASN Update Bot | Added |
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