ASN Wikibase Occurrence # 155932
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| Date: | Tuesday 14 May 2013 |
| Time: | 10:50 |
| Type: |  Piper PA-36-285 Pawnee Brave |
| Owner/operator: | Four States Sky Ag Llc |
| Registration: | N57719 |
| MSN: | 36-7660041 |
| Year of manufacture: | 1975 |
| Total airframe hrs: | 2958 hours |
| Engine model: | Continental 6-285-A |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Cherokee County, north of Crestline, KS -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Agricultural |
| Departure airport: | Baxter Springs, KS (78KS) |
| Baxter Springs, KS (78KS) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
Shortly after takeoff, the pilot noticed a decrease in the engine's oil pressure. The engine then sustained a total loss of power, and the airplane collided with terrain during the forced landing. An examination of the engine revealed that the No. 2 piston had failed. In addition, each of the spark plugs had two washers installed, instead of one, and the oil filter contained many metal particles. The two washers likely altered the detonation characteristics of the pistons, causing them to overheat. As the No. 2 piston degraded, metal particles collected in the oil filter. Maintenance records indicate that the engine was overdue for a recommended oil change; the deteriorating piston would likely have been detected during an oil change. The mechanic who performed the last annual inspection was not aware that additional spark plug washers had been installed on the engine.
Probable Cause: The loss of engine power due to improper maintenance by an unknown individual that led to the degradation and deterioration of the No. 2 piston, which was undetected because of overdue maintenance.
Accident investigation:
 |
|
Sources:
NTSB
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 14-May-2013 19:34 | Geno | Added |
| 31-May-2013 00:45 | Anon. | Updated [Time] |
| 07-Oct-2015 07:25 | Tim kellogg | Updated [Departure airport, Destination airport] |
| 21-Dec-2016 19:28 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 28-Nov-2017 14:38 | ASN Update Bot | Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative] |
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