ASN Wikibase Occurrence # 157385
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| Date: | Saturday 11 December 1999 |
| Time: | 09:15 LT |
| Type: |  Mooney M20C |
| Owner/operator: | Paul L. Bendigo |
| Registration: | N6715U |
| MSN: | 2447 |
| Total airframe hrs: | 4600 hours |
| Engine model: | Lycoming O-360-A1D |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Reading Regional/Carl A Spaatz Field, Reading, PA -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Private |
| Departure airport: | (KRDG) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
Shortly after takeoff, the pilot experienced a loss of engine power, and performed a forced landing. Examination of the engine revealed a 1-inch by 6-inch hole, in the engine crankcase adjacent to the number two cylinder, and a fractured number two cylinder connecting rod. Additionally, the crankshaft installed in the engine, required the installation of sludge tubes in the crank-pins. Examination of the crankshaft revealed that the sludge tubes had not been installed. According to a representative of the engine manufacturer, the crankshaft installed in the engine was not approved for use in that model engine. Additionally, the absence of the crankshaft sludge tubes would not allow pressure oil to reach the connecting rod bearings and the connecting rod bearings would only receive splash, vapor and centrifugal force oil. The engine had been operated for about 940 hours since it was overhauled on April 16, 1990 and there were no logbook entries which indicated the crankshaft had been removed or replaced since the overhaul.
Probable Cause: The failure of the number two connecting rod after an improper overhaul by maintenance personnel.
Accident investigation:
 |
|
Sources:
NTSB NYC00LA050
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 01-Jul-2013 16:03 | JINX | Added |
| 14-Dec-2017 11:34 | ASN Update Bot | Updated [Time, Departure airport, Destination airport, Source, Narrative] |
| 07-Apr-2024 16:25 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Departure airport, Source, Narrative, Category, Accident report] |
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