ASN Wikibase Occurrence # 73821
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| Date: | Sunday 4 April 2010 |
| Time: | 10:35 |
| Type: |  Cessna P210N Pressurized Centurion |
| Owner/operator: | Norris Brown |
| Registration: | N3599P |
| MSN: | P21000039 |
| Year of manufacture: | 1978 |
| Total airframe hrs: | 4175 hours |
| Engine model: | Continental TSIO-520 SER |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Near Lake Wenatchee, Washington State -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Everett, WA (KPAE) |
| Spokane, WA (KSFF) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The airplane was in a cruise flight configuration when the engine ceased operating without warning. The pilot made an emergency descent and the airplane collided with a fence while landing in a field. Disassembly of the engine revealed extensive mechanical damage to the number two cylinder combustion chamber and piston assembly. The exhaust valve seat insert was missing and fragments of the insert were later found in the oil sump. The exhaust valve head had separated from the valve stem. The intake valve head had approximately 50 percent of the material separated. The fracture surfaces on the exhaust valve, intake valve and exhaust valve seat were damaged such that the mode of fracture could not be definitively determined. Hardness testing of the components indicted that they were within the manufacturer’s prescribed specifications. The sequence of fractures and separations of components could not determined.
Probable Cause: The failure of the number two cylinder exhaust and intake valves for undetermined reasons, which resulted in a loss of engine power.
Accident investigation:
 |
|
Sources:
NTSB
https://www.wenatcheeworld.com/news/2010/apr/04/plane-makes-emergency-landing-into-marsh/_/
https://flightaware.com/live/flight/N3599P/history/20100404/2210Z/KPAE/KSFF
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 04-Apr-2010 22:05 | slowkid | Added |
| 05-Apr-2010 04:17 | RobertMB | Updated [Time, Aircraft type, Registration, Cn, Operator, Total occupants, Departure airport, Destination airport, Source] |
| 21-Dec-2016 19:25 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 26-Nov-2017 16:34 | ASN Update Bot | Updated [Operator, Other fatalities, Departure airport, Destination airport, Source, Narrative] |
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