ASN Wikibase Occurrence # 353112
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| Date: | Tuesday 29 June 1999 |
| Time: | 12:40 LT |
| Type: |  Mooney M20F |
| Owner/operator: | Private |
| Registration: | N7114V |
| MSN: | 220049 |
| Year of manufacture: | 1974 |
| Total airframe hrs: | 2128 hours |
| Engine model: | Lycoming IO360 A1A |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Liberty, NC -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Newport News, VA |
| Mooresville, NC (14A | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The flight was in cruise at 6,500 feet msl, when the engine started to run rough. Two to three minutes later the engine stopped operating, and the pilot requested vectors to the nearest airport. While setting himself up for a forced landing, the cabin filled with smoke, and the pilot cracked open the cabin door to evacuate the smoke. The airplane touched down short of the runway and sustained main landing gear damage. Postcrash examination revealed muffler and muffler shroud breaching that allowed engine exhaust to impinge on and burn components of the nose landing gear, the air induction system, and the lower fuselage. NTSB Materials Laboratory examination revealed the muffler failed due to scaling and intergranular attack occurring over a period of time that would have been evident 30 flight hours previous when the airplane underwent an annual inspection.
Probable Cause: Improper inspection of the muffler assembly resulting in erosion going undetected and the rupture of the muffler and shroud while in cruise flight. The condition caused melting of portions of the air induction system, loss of engine power, and the pilot's attempted forced landing that resulted in collision with terrain that sheared one main landing gear and fractured the wheel of the other main landing gear. A factor in the accident was the pilot's obscured vision due to smoke in the cockpit.
Accident investigation:
 |
|
Sources:
NTSB MIA99LA191
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 09-Mar-2024 10:29 | ASN Update Bot | Added |
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