ASN Wikibase Occurrence # 147747
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| Date: | Thursday 16 August 2012 |
| Time: | 21:54 |
| Type: |  Piper PA-24-260 Comanche |
| Owner/operator: | Private |
| Registration: | N8546P |
| MSN: | 24-4003 |
| Year of manufacture: | 1964 |
| Total airframe hrs: | 8545 hours |
| Engine model: | Lycoming TIO-540-D4A5 |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | A road 3 miles west of Holton, KS -
 United States of America
|
| Phase: | En route |
| Nature: | Executive |
| Departure airport: | Mitchell, SD (KMHE) |
| Topeka, KS (KTOP) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
During a cross-country flight, the pilot and passengers smelled something burning; smoke began to fill the cockpit, and the oil pressure dropped. The propeller then oversped, and the engine seized. In the ensuing forced landing in the dark, the airplane struck trees and impacted a ditch. The engine was covered with oil, and the right magneto was found hanging by spark plug wires. The separation of the right magneto from the engine allowed the engine oil to escape, causing the engine to seize. The magneto had been installed in the airplane about 7 hours before the accident. The mechanic who had replaced the magneto could not recall if he had torqued the magneto attachment nuts. It is likely that the right magneto attachment nuts were not torqued properly and came loose.
Probable Cause: The mechanic's failure to adequately torque the right magneto attachment nuts, allowing the right magneto to come loose, which allowed engine oil to escape, causing the engine to seize.
Accident investigation:
 |
|
Sources:
NTSB
History of this aircraft
Other occurrences involving this aircraft
| 12 October 2006 | N8546P | 0 | Osage Beach, Missouri | |
sub | |
| 29 March 2011 | N8546P | 0 | Kansas City, Missouri | |
sub | |
| Gear-up landing | ||||||
Location
Images:
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 17-Aug-2012 01:17 | gerard57 | Added |
| 17-Aug-2012 09:05 | Geno | Updated [Operator, Location, Nature, Destination airport, Source, Narrative] |
| 21-Dec-2016 19:28 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 26-Jul-2017 08:30 | Anon. | Updated [Source, Narrative, Photo, ] |
| 28-Nov-2017 13:18 | ASN Update Bot | Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative] |
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