ASN Wikibase Occurrence # 287485
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| Date: | Tuesday 14 August 2012 |
| Time: | 05:20 LT |
| Type: |  Rockwell S-2R Thrush Commander |
| Owner/operator: | Royal Flying Service Inc. |
| Registration: | N8468V |
| MSN: | 2228R |
| Total airframe hrs: | 14304 hours |
| Engine model: | Pratt & Whitney R-1340 |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Royal City, Washington -
 United States of America
|
| Phase: | Initial climb |
| Nature: | Agricultural |
| Departure airport: | Royal City, WA (8WA) |
| Royal City, WA (8WA) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot stated that shortly after taking off for the aerial application flight the engine began to run rough. Because he could not maintain altitude and was concerned about clearing a set of power lines in front of him, the pilot partially dumped the airplane's aerial application load. After the airplane cleared the power lines, the pilot attempted to land on a road; however, during the touchdown the airplane veered off of the road and into a ditch. A postaccident fire consumed the airplane. A postaccident examination of the engine revealed that the No. 2 cylinder exhaust rocker boss housing had separated from the cylinder, which prevented the cylinder's exhaust valve from opening and resulted in the loss of engine power. Maintenance records revealed that the cylinder had been inspected in accordance with the time interval specified by the applicable Federal Aviation Administration airworthiness directive (AD). The AD specifies a 100-hour recurring inspection requirement; the engine had accumulated 91 hours since its last inspection.
Probable Cause: The loss of engine power due to the separation of the No. 2 cylinder exhaust rocker boss housing, which prevented the exhaust valve from opening.
Accident investigation:
 |
|
Sources:
NTSB WPR12LA356
History of this aircraft
Other occurrences involving this aircraft
| 12 June 2003 | N8468V | Royal City Flying Service | 0 | Royal City, Washington | |
sub |
| 24 May 2012 | N8468V | Royal Flying Service Inc | 0 | Royal City, Washington | |
sub |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 04-Oct-2022 11:22 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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