Agricultural aircraft impact following loss of altitude

Casualties unknown • 50 km E of Walgett Airport, New South Wales

An agricultural aircraft crashed into trees and ground after failing to maintain altitude following a takeoff, despite the pilot's attempt to dump the hopper load.

What happened

During a takeoff attempt, the aircraft failed to achieve sufficient altitude and struck a fence approximately 1,300 m from the runway threshold. Following this initial contact, the aircraft continued to descend, eventually striking trees and the ground an additional 700 m along its flight path. The impact resulted in fire damage to the airframe. There were no fatalities or injuries reported in this occurrence.

The investigation

Investigators examined the aircraft and the circumstances surrounding the flight. The inspection of the engine and the airframe revealed no evidence of mechanical or structural failure that could have contributed to the loss of altitude. The pilot was found to be appropriately qualified and possessed the necessary experience for low-level and agricultural flight operations. Furthermore, the investigation found no pilot-related preconditions that contributed to the accident.

Findings

Several operational factors were identified that reduced the aircraft's performance during the flight. These contributing factors included high outside air temperature, the weight of the aircraft, and the presence of tailwind conditions. Additionally, the retraction of the flaps at a point prior to the impact further degraded performance. While the pilot attempted to dump the hopper load to improve climb capability, the investigation determined that no significant amount of the contents was released, leaving the aircraft unable to maintain its flight path.

Probable cause

The accident was caused by a combination of high ambient temperature, aircraft weight, tailwind, and the retraction of flaps, which collectively prevented the aircraft from maintaining altitude, compounded by an unsuccessful attempt to dump the hopper load.

Frequently asked questions

What happened in the 2016-11-05 Air Tractor Inc AT-502 accident near 50 km E of Walgett Airport, New South Wales?

An agricultural aircraft crashed into trees and ground after failing to maintain altitude following a takeoff, despite the pilot's attempt to dump the hopper load.

What aircraft was involved and where did it happen?

The accident on 2016-11-05 involved a Air Tractor Inc AT-502, registration VH-LIK, at 50 km E of Walgett Airport, New South Wales.

What was the probable cause of the accident?

The accident was caused by a combination of high ambient temperature, aircraft weight, tailwind, and the retraction of flaps, which collectively prevented the aircraft from maintaining altitude, compounded by an unsuccessful attempt to dump the hopper load.

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