ASN Wikibase Occurrence # 140011
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| Date: | Tuesday 22 November 2011 |
| Time: | 10:55 |
| Type: |  Cessna 152 |
| Owner/operator: | Ascend Aviation LLC |
| Registration: | N6436P |
| MSN: | 15285013 |
| Year of manufacture: | 1981 |
| Total airframe hrs: | 15700 hours |
| Engine model: | Lycoming 0-235 SERIES |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | South of Princeton Municipal Airport - KPNM -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Private |
| Departure airport: | Princeton, MN (PNM) |
| Princeton, MN (PNM) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The student pilot conducted two takeoffs and landings without incident. During initial climb after the third takeoff, he heard a loud “pop,” and the airplane started to vibrate severely and lose engine power. He executed a forced landing to a nearby field. The airplane landed hard and nosed over during the landing roll. The examination of the airplane revealed that the lower spark plug from the No. 2 cylinder and its associated threaded insert were missing. The threads in the top portion of the spark plug hole were stripped, and only the bottom three threads remained. No other engine anomalies were observed. The engine maintenance logbook indicated that, 7 days prior to the accident, the Nos. 1 and 2 cylinders had new threaded inserts installed in the lower spark plug holes.
Probable Cause: The inadequate installation of the threaded insert in the No. 2 cylinder spark plug hole by maintenance personnel, which resulted in a loss of engine power during initial climb.
Accident investigation:
 |
|
Sources:
NTSB
History of this aircraft
Other occurrences involving this aircraft
| 2 May 1989 | N6436P | Private | 0 | Buffalo, MN | |
sub |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 23-Nov-2011 04:20 | RobertMB | Added |
| 21-Dec-2016 19:26 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 27-Nov-2017 17:23 | ASN Update Bot | Updated [Other fatalities, Nature, Departure airport, Destination airport, Source, Narrative] |
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