ASN Wikibase Occurrence # 365084
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| Date: | Saturday 22 June 1991 |
| Time: | 09:45 LT |
| Type: |  Cessna 180G |
| Owner/operator: | Maxl Willis |
| Registration: | N4700U |
| MSN: | 18051400 |
| Engine model: | CONTINENTAL O-470R |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Challis, ID -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Flying B Ranch, ID |
| Camas Creek, ID | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE CESSNA 180 WAS IN CRUISE FLIGHT A FEW MINUTES AFTER DEPARTURE WHEN THE ENGINE BEGAN RUNNING ROUGH AND LOST POWER. THE PILOT WAS UNABLE TO RETURN TO A SAFE LANDING SITE, SO ELECTED TO ATTEMPT A FORCED LANDING NEAR A RIVER. AN ENGINE TEARDOWN REVEALED THAT THE EXHAUST VALVE ROCKER SHAFT BOSS ON ONE CYLINDER HAD FAILED AND THE BROKEN PIECE MIGRATED UNDER THE INTAKE ROCKER SHAFT, WHERE IT CAUSED THE VALVE PUSH ROD TO BEND.
Probable Cause: THAT THE PILOT ENCOUNTERED UNSUITABLE TERRAIN DURING A FORCED LANDING AFTER A POWER LOSS DUE TO A FRACTURED CYLINDER BOSS AND A BENT ENGINE PUSHROD.
Accident investigation:
 |
|
Sources:
NTSB SEA91LA139
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 20-Mar-2024 06:25 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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