What happened
On August 2, 2011, a Yakovlev Yak-52, registration RA-1428K, was performing a training flight at Lelystad Airport. During the landing circuit for runway 05, the pilot found himself positioned closely behind other active traffic. To create more separation from the preceding aircraft, the pilot decided to execute a 360-degree turn.
As the aircraft entered this maneuver, it was flying at a low altitude and low speed. Witnesses observed the aircraft at a high angle of attack. During the turn, the aircraft entered an unrecoverable stall, causing the right wing to drop. The aircraft subsequently rolled inverted and crashed into a nearby grain field, where a post-impact fire broke out. The pilot, a 45-year-old man, sustained fatal injuries.
The investigation
The Dutch Safety Board (OVV) examined the flight sequence, radio communications, and the aircraft's technical condition. Investigators reviewed recordings from the airport's radio service, which revealed that the pilot had notified the tower of his intention to perform the large turn. The tower staff responded by advising the pilot to perform a go-around instead, due to the presence of other traffic on the final approach, but the pilot did not follow this instruction.
Technical analysis of the Yakovlev Yak-52 showed that the landing gear was extended and locked, and the flaps were in the down position. While the engine and control cables were functional, the investigation also noted that the aircraft's Russian registration and airworthiness certificate were not valid for operation within the Netherlands. Furthermore, the pilot's Russian license was not recognized in Dutch airspace.
Findings
- The primary cause of the accident was the aircraft entering a stall at a low altitude from which recovery was impossible.
- The pilot failed to follow standard circuit procedures by attempting an improper maneuver to create separation.
- The pilot did not follow the tower's instruction to perform a proper missed approach/go-around.
- Inadequate lookout and situational awareness contributed to the loss of control.
- The pilot's decision to execute a sharp, high-load turn at low speed directly led to the aerodynamic stall.