What happened
A flight instructor was conducting training operations involving the simulation of a forced landing directed toward the active runway. During the approach phase, the crew observed a vehicle crossing the runway surface directly in front of their aircraft. Despite the visual contact with the obstacle, the pilot was unable to arrest the descent or stop the aircraft prior to impact. The collision resulted in damage to the aircraft and the vehicle.
The investigation
Post-accident examination of the aircraft revealed a critical mechanical deficiency. Investigators determined that the aircraft's anti-collision lighting system had been inoperative prior to the time of the accident. This equipment failure meant that the aircraft was not emitting the standard visual warning signals intended to enhance its visibility to ground vehicles and other air traffic.
Findings
The primary contributing factor to this incident was the operation of an aircraft with inoperative anti-collision lights. The lack of active strobe or rotating beacon lighting significantly reduced the conspicuity of the aircraft to the vehicle operator on the runway. While the pilot observed the vehicle, the absence of the light system likely impaired the vehicle driver's ability to detect and react to the approaching aircraft in time to avoid the collision.
Safety message
This incident highlights the critical importance of maintaining all required lighting systems, particularly anti-collision lights, prior to flight. These lights are essential for situational awareness on the airport surface and during low-altitude operations. Operators must ensure that pre-flight checks verify the functionality of these systems to prevent similar visibility-related conflicts.