ASN Wikibase Occurrence # 294084
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| Date: | Friday 18 February 2005 |
| Time: | 15:23 LT |
| Type: | Mooney M20P |
| Owner/operator: | Private |
| Registration: | N321DT |
| MSN: | 24-1360 |
| Total airframe hrs: | 2928 hours |
| Engine model: | Lycoming IO-23307-51A |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Smith, Alabama -
 United States of America
|
| Phase: | Unknown |
| Nature: | Private |
| Departure airport: | Decatur-Pyor Airport, AL (DCU/KDCU) |
| Columbus-Metropolitan Area, GA (CSG/KCSG) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
While on an instrument flight the engine stopped and oil covered the windshield. The pilot declared an emergency and the air traffic controller attempted unsuccessfully to vector the flight to a nearby grass airstrip. The pilot selected an off-airport location for an emergency landing. The airplane collided with a tree while the pilot was maneuvering for the emergency landing. Post-accident examination of the engine revealed that the #2 cylinder assembly had separated from the crankcase. The #2 cylinder was recovered and exhibited fretting on the mating surface of the base flange. Post-accident examination revealed that the torque on the adjacent cylinder hold down nuts were less than what was prescribed for installation. A review of the engine maintenance records revealed that on 12/18/2002, the #1 cylinder assembly was replaced. The cylinder was overhauled by Aviation Engines and installed by North Alabama Aviation. At the time of the accident the engine had accumulated 85.6 hours since the #1 cylinder assembly had been replaced.
Probable Cause: Maintenance personnel failure to properly torque the cylinder head during installation that resulted in the separation from the engine assembly and the subsequent loss of power.
Accident investigation:
 |
|
Sources:
NTSB ATL05LA051
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 10-Oct-2022 17:05 | ASN Update Bot | Added |
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