ASN Wikibase Occurrence # 298402
This information is added by users of ASN. Neither ASN nor the Flight Safety Foundation are responsible for the completeness or correctness of this information.
If you feel this information is incomplete or incorrect, you can submit corrected information.
| Date: | Thursday 11 October 2001 |
| Time: | 15:40 LT |
| Type: | Cessna T206H |
| Owner/operator: | Longleaf, LLC |
| Registration: | N919LL |
| MSN: | T20608174 |
| Year of manufacture: | 2000 |
| Total airframe hrs: | 296 hours |
| Engine model: | Lycoming TIO-540-AJ1A |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | LakeLanier Isl., Georgia -
 United States of America
|
| Phase: | Unknown |
| Nature: | Private |
| Departure airport: | Johnstown-Cambria County Airport, PA (JST/KJST) |
| Atlanta-DeKalb Peachtree Airport, GA (PDK/KPDK) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
Approximately 3 1/2 hours into the flight while flying at 5,000 feet, the pilot heard a loud bang followed by "extreme vibration" of the airframe. He noted a total loss of engine power and a slight smell of smoke. The flight was vectored to a nearby airport but based on the altitude and distance, the pilot was unable to land there. The airplane was ditched with full flaps in a lake and after touchdown the airplane became inverted. The pilot and one passenger exited the airplane which was recovered revealing an oil residue in the engine compartment and also on the bottom skin of the fuselage. Examination of the engine revealed that the right side of the accessory case was displaced aft approximately 2 inches, the crankcase was fractured from the No. 5 to the No. 6 cylinder positions, the crankshaft and the No. 6 cylinder connecting rod were fracture separated. Disassembly of the engine revealed that the No. 5 main bearing saddle was separated from the crankcase and sustained "heavy damage." The parting surfaces of the crankcase halves at the No, 4 main bearing position exhibited "light fretting." Additionally, the crankshaft was fractured at the rear No. 5 crankpin to counterweight cheek area. Metallurgical examination of the fracture surface of the crankshaft revealed fatigue. No, "... non-conformances could be found with the crankshaft or other associated components." The engine had accumulated approximately 296 hours since manufacture at the time of the failure as determined by the airplane's recording tachometer. Review of the maintenance records revealed that the engine oil was drained and serviced last on September 25, 2001.
Probable Cause: The fatigue failure of the crankshaft for undetermined reasons resulting in the total loss of engine power. A contributing factor in the accident was the unsuitable terrain encountered by the pilot during the forced landing.
Accident investigation:
 |
|
Sources:
NTSB MIA02LA008
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 15-Oct-2022 17:35 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
The Aviation Safety Network is an exclusive service provided by:
Quick Links:
| ASN Home | Send Correction / Feedback |
| FSF Home | Disclaimer | Copyright |
| Contact Us | Privacy Policy |
| Press / Media |
CONNECT WITH US:
©2024 Flight Safety Foundation