ASN Wikibase Occurrence # 352831
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| Date: | Wednesday 11 August 1999 |
| Time: | 15:00 LT |
| Type: |  Air Tractor AT-402A |
| Owner/operator: | Private |
| Registration: | N402RE |
| MSN: | 402A-1027 |
| Year of manufacture: | 1997 |
| Total airframe hrs: | 769 hours |
| Engine model: | P&W PT6A-11AG |
| Fatalities: | Fatalities: 0 / Occupants: 1 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Mead, CO -
 United States of America
|
| Phase: | Approach |
| Nature: | Agricultural |
| Departure airport: | Carrera Airpark, CO |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot performed an aerial spray of a field with insecticides and was returning for landing at the privately-owned airstrip. While 100 ft. agl, the pilot reported a loss of engine power and the aircraft landed in a field of 6-foot tall corn stalks 150 yards short of the runway. Following the accident, the aircraft's engine was disassembled and examined, then reassembled and run in a test cell. No abnormalities or discrepancies were found that would have interfered with normal engine operation. An examination of the aircraft's propeller blades revealed that each of the propeller blades were bent in the reverse direction. The power lever in the aircraft is designed with a beta mode in which the pilot can manually pull the throttle rearward with corresponding negative blade angles. It takes between 3 to 6 seconds for the engine to respond to increased engine power input. The Airplane Flight Manual for the aircraft states that during approach to landing, the pilot is instructed to adjust the power lever to provide the required rate of descent, to 'not move [the] power lever below the idle stop position,' and to verify that the beta light is out.
Probable Cause: The pilot's failure to follow proper approach to landing procedures as outlined in the Airplane Flight Manual. A factor was the 6-foot tall corn stalks.
Accident investigation:
 |
|
Sources:
NTSB DEN99LA149
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 08-Mar-2024 20:32 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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