Accident Air Tractor AT-502 N1035F, Tuesday 16 December 2008
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Date:Tuesday 16 December 2008
Time:10:08 LT
Type:Silhouette image of generic AT5T model; specific model in this crash may look slightly different    
Air Tractor AT-502
Owner/operator:Gilbert Aviation Industries Inc
Registration: N1035F
MSN: 502-0081
Year of manufacture:1990
Total airframe hrs:9990 hours
Engine model:Pratt & Whitney PT6A-34
Fatalities:Fatalities: 0 / Occupants: 1
Other fatalities:0
Aircraft damage: Substantial
Location:Dinuba, California -   United States of America
Phase: Standing
Departure airport:Visalia, CA (D86)
Destination airport:Visalia, CA (D86)
Investigating agency: NTSB
Confidence Rating: Accident investigation report completed and information captured
The pilot reported that about halfway through the first spray pass he experienced a complete loss of engine power. The pilot stated that he pulled up out of the field, dumped the load, and chose to land straight ahead in an adjoining field. The pilot reported that after touching down and holding the stick back the tail started lifting. Before it stopped, the airplane nosed over and came to rest inverted. A Federal Aviation Administration (FAA) airworthiness aviation safety inspector conducted a post accident examination of the airplane. The airplane's most recent annual inspection had been completed the day prior to the accident. The FAA inspector found the engine's Py line had not been secured properly, which would have prevented proper fuel scheduling to the engine's fuel control unit. The inspector also reported that the outboard leading edge of the left wing tip had sustained substantial damage, which would have adversely affected the flight characteristics of the airplane.

Probable Cause: The failure of maintenance personnel to properly install the engine's Py line correctly, which resulted in the total loss of engine power and subsequent force landing. Contributing to the accident was the lack of suitable terrain.

Accident investigation:
Investigating agency: NTSB
Report number: WPR09CA064
Status: Investigation completed
Duration: 1 month
Download report: Final report




Revision history:

02-Oct-2022 09:20 ASN Update Bot Added

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