ASN Wikibase Occurrence # 293881
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| Date: | Wednesday 20 April 2005 |
| Time: | 16:03 LT |
| Type: |  Beechcraft A36TC |
| Owner/operator: | Jestair, LLC |
| Registration: | N3810X |
| MSN: | EA186 |
| Total airframe hrs: | 3445 hours |
| Engine model: | Continental TSIO-520-K1B |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Southbury, Connecticut -
 United States of America
|
| Phase: | Unknown |
| Nature: | Executive |
| Departure airport: | Cleveland-Cuyahoga County Airport, OH (CGF/KCGF) |
| Providence-Theodore Francis Greene State Airport, RI (PVD/KPVD) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
During taxi, runup, and takeoff, the pilot did not notice any anomalies with the engine, and the flight progressed without incident until about 90 miles short of the intended destination when the engine started to run rough for a few seconds before it stopped producing power. The windscreen became covered with oil, and the pilot executed an off airport forced landing, substantially damaging the airplane. External examination of the engine revealed three holes in the top of the engine case, and a crankshaft counter weight pin resting on top of the engine. Internal examination of the engine revealed heavy mechanical damage on the No. 5 counter weight, and the engine case in the vicinity of the No. 3 and No. 4 cylinders. Examination of the No. 5 counter weight assembly revealed that one of the two aft snap rings, plates, and pins were missing. The pin was located on top of the engine during the external examination, but neither the snap ring nor plate could be located. The fact that the engine was operated for approximately 16 hours since overhaul, along with the witness mark on the surface of the counter weight, suggested that the snap ring, plate, and pin were installed; however, it could not be determined if the snap ring was properly seated. A review of engine overhaul records revealed that on February 5, 2005, the counterweights, along with the pins, plates, and snap rings were installed on the crankshaft.
Probable Cause: The failure of the counter weight aft snap ring to hold the associated plate and pin in place, which resulted in a total loss of engine power.
Accident investigation:
 |
|
Sources:
NTSB NYC05LA074
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 10-Oct-2022 14:37 | ASN Update Bot | Added |
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