Incident Description
On October 2, 2021, a Tecnam P2006T aircraft, registration SP-ZNA, was conducting a training flight from Bydgoszcz Airport (EPBY) with a student and an instructor on board. After takeoff, during the landing gear retraction sequence, the cockpit displayed a persistent "GEAR PUMP ON" message. This message typically extinguishes when the gear is fully retracted and locked, indicating a malfunction. The crew also observed that the hydraulic pump for the landing gear system continued to operate without interruption.
Crew Actions
The flight crew followed the emergency procedures specified in the aircraft's checklist for this exact situation. They first attempted to extend the landing gear using the normal system, but the gear did not deploy. Subsequently, they performed the emergency landing gear extension procedure, which successfully lowered and locked the landing gear.
Outcome
The aircraft landed safely at the departure airport. No damage to the aircraft was reported during the incident. After the flight, the aircraft was turned over to a maintenance organization to inspect the landing gear retraction and extension systems.
Cause
The Polish State Commission on Aircraft Accident Investigation (PKBWL) determined that the incident was caused by a failure of a contactor in the electrical circuit powering the hydraulic pump of the landing gear system.
Contributing Factors and Recommendations
No contributing factors were identified. The commission issued no safety recommendations.