What happened
On October 16, 2020, an Air Tractor AT-502B, registration PR-WGC, was performing a takeoff from a private agricultural landing strip at Granja Santa Lourdes, located in Uruguaiana, Rio Grande do Sul. The aircraft was engaged in an agricultural spraying operation.
As the aircraft accelerated down the runway, the pilot reached a speed of approximately 60 knots when livestock were spotted at the far end of the landing area. Due to the terrain's slope, the pilot had been unable to see the animals from the start of the takeoff roll. In an attempt to avoid a collision, the pilot initiated an aborted takeoff by reducing power and applying brakes. During this maneuver, the aircraft lost directional control and veered to the left. While attempting to use reverse thrust to avoid a perimeter fence, the right landing gear struck an earthen mound, causing the aircraft to yaw approximately 180 degrees. The aircraft sustained substantial damage to the propeller, right landing gear, and right wing, though the pilot remained uninjured.
The investigation
CENIPA investigators examined the aircraft's maintenance records, finding that the Air Tractor AT-502B was airworthy, with all inspections and certificates up to date. The pilot was found to be fully qualified, holding valid commercial licenses and medical certification.
Meteorological data from a nearby station indicated favorable flying conditions, though investigators noted that wind variations (ranging from 040 to 100 degrees) could have contributed to the loss of directional control. The investigation also focused on the runway infrastructure, noting that the terrain's elevation change obscured the pilot's view of the far end of the strip during the initial stages of the takeoff roll. While no animals were found on the runway immediately following the accident, the presence of gates and access points nearby suggested that livestock could have entered the area.
Findings
- The terrain's slope at the runway threshold restricted the pilot's forward visibility.
- The pilot identified livestock on the runway during the takeoff roll at approximately 60 knots.
- The attempt to abort the takeoff resulted in the aircraft losing the centerline to the left.
- Inadequate flight planning was identified as a contributing factor.
- The pilot's application of controls during the emergency maneuver contributed to the excursion.