ASN Wikibase Occurrence # 293494
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| Date: | Thursday 21 October 2004 |
| Time: | 15:03 LT |
| Type: |  Piper PA-32RT-300T |
| Owner/operator: | Robert Thomas Webb |
| Registration: | N19TL |
| MSN: | 32R-7887035 |
| Year of manufacture: | 1978 |
| Total airframe hrs: | 3461 hours |
| Engine model: | Lycoming TIO-540-S1AD |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Guntersville, Alabama -
 United States of America
|
| Phase: | Unknown |
| Nature: | Private |
| Departure airport: | Gallatin, TN (M33) |
| Destin Airport, FL (DSI/KDTS) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
During cruise flight the engine lost power, the pilot declared an emergency and decided to make a forced landing in a nearby field. While maneuvering for the emergency landing the airplane collided with a tree short of the intended landing area, fell to the ground, and burst into flames. Examination of the engine found no measurable quantity of oil remained in the sump, only residual oil remained, which was dark black in color. The crankcase was breached, and large holes in the crankcase were observed above the #2 and #6 cylinders. The internal components of the valve train were examined and widespread spalling of the tappet bodies was noted. Severe wear of the camshaft was also noted. Four of the nine cam lobes exhibited severe wear. The crankshaft main bearings exhibited dirt and particle embedment from metal particles contaminating the oil supply. According to a Service letter issued by Lycoming; Service Letter No. SL206A, dated May 5, 1985 which addresses the subject of field reconditioned tappet bodies, SL206A states that field reconditioned tappet bodies often leads to camshaft and tappet body problems in a very short time, thereby necessitating their removal and replacement. Severe wear or spalling of the cam lobes and tappet bodies can result in metal particles contaminating the oil supply.
Probable Cause: Total loss of engine power due to engine oil contamination, engine oil starvation, and multiple connecting rod bearing failures.
Accident investigation:
 |
|
Sources:
NTSB ATL05LA007
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 10-Oct-2022 06:41 | ASN Update Bot | Added |
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