ASN Wikibase Occurrence # 353774
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| Date: | Friday 18 September 1998 |
| Time: | 15:00 LT |
| Type: |  Piper PA-28RT-201T |
| Owner/operator: | Wings Of Denver Flying Club |
| Registration: | N8252S |
| MSN: | 28R8031170 |
| Total airframe hrs: | 4792 hours |
| Engine model: | Continental TSIO-360-F |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Duck Creek, UT -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Moab, UT (KCNY) |
| Las Vegas, NV (KVGT) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The airplane was in cruise flight at 12,500 feet when the pilot noticed the manifold pressure had dropped from 51.8 inches to 25 inches. 'The engine had poor response to throttle movement, and the engine sounded bad when I moved the throttle.' He made the decision not to proceed further due to the remote terrain. As he checked his maps for the nearest airport, the airplane lost altitude. 'The engine did not seem to have much power, and I was about 3,000 feet AGL by this time.' The pilot made a forced landing on a dirt road. During rollout the aircraft struck poles alongside of a cattle guard. According to the salvage company and the FAA inspector who examined the engine, two of the four screws securing the rocker cover on the number 3 cylinder were missing, and oil was leaking out. The rocker cover had a round indention on the outside, and a wear mark on the inside. The exhaust rocker arm studs were also loose. The rear stud was only finger tight. Aluminum was found imbedded in its threads. The front stud was loose, but its nut locking mechanism was still in place.
Probable Cause: Loose intake valve rocker arm studs that allowed a loss of compression and a loss of oil. A factor was unsuitable terrain on which to make a forced landing and poles next to a cattle guard.
Accident investigation:
 |
|
Sources:
NTSB FTW98LA404
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 10-Mar-2024 10:23 | ASN Update Bot | Added |
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