ASN Wikibase Occurrence # 236815
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| Date: | Wednesday 27 June 2018 |
| Time: | 20:00 |
| Type: |  Air Tractor AT-502 |
| Owner/operator: | Ross Seed Co Inc |
| Registration: | N502S |
| MSN: | 502B-0456 |
| Year of manufacture: | 1997 |
| Engine model: | Pratt & Whitney Canada PT-6A-34AG |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Tappen, ND -
 United States of America
|
| Phase: | Take off |
| Nature: | Agricultural |
| Departure airport: | Tappen, ND (PVT) |
| Tappen, ND (PVT) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot reported that he noticed degraded engine performance when the airplane was about halfway down the runway during takeoff for the aerial application flight. Specifically, the engine torque decreased from 1,700 ft-lbs at the start of the takeoff to 1,500 ft-lbs. He determined that there was not enough runway to abort the takeoff and stop the airplane, so he applied full power and dumped the product load. The engine continued to lose power, and the airplane subsequently continued off the end of the runway and nosed over in high vegetation. Postaccident examination of the airplane and engine, including individual testing of several engine components, confirmed that the engine was producing power during the impact sequence, but no determination could be made as to how much power the engine produced. The examination did not reveal any mechanical malfunctions or failures that would have precluded normal operation.
Probable Cause: The partial loss of engine power for reasons that could not be determined based on the available evidence.
Accident investigation:
 |
|
Sources:
NTSB
History of this aircraft
Other occurrences involving this aircraft
| 8 October 1998 | N502S | Superior Ag-air, Inc. | 0 | Ringling, OK | |
sub |
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 08-Jun-2020 08:40 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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