Accident: Air Tractor Inc AT 602
Dec 27, 2016 · Willows, CA
NTSB numberWPR17LA042Event id20161228X11654
- 0
- Fatalities
- 0
- Serious injuries
- 0
- Minor injuries
- 1
- Uninjured
Probable cause
The decision of the maintenance facility mechanic to conduct maintenance without reference to the applicable manufacturer’s guidance, which resulted in the improper reassembly and subsequent failure of the engine compressor bleed valve, which in turn prevented the engine from responding to further power demand at a critical phase of flight. Contributing to the accident was the failure of the maintenance facility’s director of maintenance to ensure that the overhaul was conducted properly and that the required post-maintenance test procedures were accomplished.
Source: National Transportation Safety Board. Record last changed Oct 28, 2026, 10:54 UTC.
Aircraft involved
- Aircraft
- Air Tractor Inc AT 602
- Registration
- N602L
- Year built
- 1999
- Category
- Airplane
- Damage
- Substantial
- Operating rules
- Part 91: general aviation
- Defining event
- Approach-VFR pattern final Loss of engine power (partial)
Source: National Transportation Safety Board aviation accident database. Counts only; Voydar holds no names.
Nearest airports
Airports with a Voydar profile closest to the recorded position. Proximity only.
- Willows Glenn County Airport (WLW)0 nm (1 km) north
This page restates the NTSB's public record. Injury figures are counts; Voydar does not hold or publish the names of anyone involved.