ASN Wikibase Occurrence # 353970
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| Date: | Saturday 8 August 1998 |
| Time: | 12:50 LT |
| Type: |  Piper PA-31-350 |
| Owner/operator: | Air Bridge, Inc. |
| Registration: | N27196 |
| MSN: | 77-52095 |
| Total airframe hrs: | 12931 hours |
| Engine model: | Lycoming TIO-540-J2BD |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Alamosa, CO -
 United States of America
|
| Phase: | Approach |
| Nature: | Ferry/positioning |
| Departure airport: | Kansas City, MO (MKC |
| (KALS) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The airplane was being ferried to its home base after both engine had received major overhauls. As the airplane approached Alamosa, the left engine lost power. Unable to restart the engine, the pilot feathered the propeller. The landing gear would only extend partially. The airplane would not maintain flying speed nor altitude and the pilot elected to make a forced landing in a cow pasture. Examination of the engine disclosed a broken coupling bolt on the right side of the turbocharger, preventing the V-band clamp from completely securing the exhaust pipe to the turbocharger, permitting hot exhaust gases to escape into the engine compartment. The turbocharger transition baffle was found partially melted and the manifold pressure line was burnt through and separated, allowing the mixture to enrichen and flood the engine. Textron Lycoming Service Bulletin 240P requires all V-band couplings and gaskets to be replaced when an engine is overhauled. The failed V-band coupling was found to be rusted and discolored, suggesting it had not been replaced. Additionally, the failed manifold pressure line used was made of rubber instead of flex stainless steel line.
Probable Cause: Improper major overhaul of the engine by the overhaul facility. Factors were failure of the V-band clamp, the melting of the baffle and manifold clamp, and the pilot not being able to extend the landing gear.
Accident investigation:
 |
|
Sources:
NTSB FTW98LA350
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 10-Mar-2024 17:30 | ASN Update Bot | Added |
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