Accident Summary
On approach to Iquitos-Coronel Francisco Secada Vignetta Airport, the aircraft touched down on runway 06. Immediately after touchdown, it lost directional control and veered to the left side of the runway. The aircraft struck trees and bushes, resulting in the loss of its right wing. It came to rest approximately 100 meters left of the runway, broken into two sections. A fire erupted but was quickly extinguished by emergency personnel.
Injuries and Damage
All four crew members aboard the aircraft sustained minor injuries. The aircraft was destroyed in the accident.
Probable Cause
According to the official investigation, the probable cause was a runway excursion due to loss of directional control after landing. This occurred when the propeller stops were disengaged for aerodynamic braking at a speed higher than established, which generated an uncontrollable leftward turning moment caused by asymmetric thrust from the propellers.
Contributing Factors
The investigation identified several contributing factors:
- The landing was performed on an unstabilised approach, and the established go-around procedure was not executed.
- The failed landing due to asymmetric thrust was not handled by applying the operator's Quick Reference Handbook (QRH) procedure to shut down the failed engine.
- A probable failure of the KTA Fuel Regulator of the Automatic Engine Rotation Frequency and Power Regulation System, which blocked the reduction of power on the No. 2 engine to the regimes required for approach and landing.