ASN Wikibase Occurrence # 287372
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| Date: | Sunday 16 September 2012 |
| Time: | 15:00 LT |
| Type: |  Rockwell International 690A |
| Owner/operator: | Courtney Aviation |
| Registration: | N57112 |
| MSN: | 11263 |
| Year of manufacture: | 1975 |
| Total airframe hrs: | 5462 hours |
| Engine model: | Garrett TPE 331-5 |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Ellensburg, Washington -
 United States of America
|
| Phase: | Manoeuvring (airshow, firefighting, ag.ops.) |
| Nature: | Survey |
| Departure airport: | Ellensburg-Bowers Field, WA (ELN/KELN) |
| Ellensburg-Bowers Field, WA (ELN/KELN) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported that, while in a right turn at 7,500 feet mean sea level and above a land wildfire, the airplane entered a turbulent, dark, narrow, column of smoke. The pilot leveled the wings and continued flight through the turbulent column. When the airplane exited the column, the pilot noticed that he had to make a significant right flight control input to maintain level flight. He made a precautionary landing without further incident. Postaccident examination of the airplane revealed that the left aileron control rod was separated along the threaded portion of the shaft, about 2.5 inches from the rod end. Subsequent examination of both pieces of the aileron control rod revealed fracture surfaces consistent with overstress, with no indications of previous wear, fatigue, or corrosion. Thus, it is likely that the turbulence encountered while flying through the smoke column was sufficient to overstress the left aileron control rod.
Probable Cause: The pilot's failure to avoid a turbulent smoke column, which resulted in an overstress failure of the left aileron control rod.
Accident investigation:
 |
|
Sources:
NTSB WPR12LA428
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 04-Oct-2022 10:15 | ASN Update Bot | Added |
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