No fatalities

Air Tractor AT 402 accident at Somerton, AZ, 20 Sept 2020

Somerton, AZ, United States

On September 20, 2020, an Air Tractor AT 402 Undesignat operated by Tri-Rotor Spray & Chemical was involved in an aviation accident near Somerton, AZ. No fatalities were reported. Investigators recorded the probable cause as: The pilot’s failure to use full power during takeoff and his delayed decision to abort the takeoff, which resulted in a runway overrun and subsequent impact with terrain. This summary draws on records from NTSB; 12 related events involving the same aircraft type or operator are linked below.

SourcesNTSBPrimary reportUpdated 2026-08-03Data APIEditorial standards

Probable cause

The pilot’s failure to use full power during takeoff and his delayed decision to abort the takeoff, which resulted in a runway overrun and subsequent impact with terrain.

— NTSB Determination

Contributing factors

Powerplant parameters — Not attained/maintainedPilot