Cessna C 172RG OK-ALZ Landing Gear Accident at Panenský Týnec

Incident Overview and Aircraft Details On 30 October 2009, a Cessna C 172RG with registration OK-ALZ, operated by Aviatický klub s.r.o., experienced an accident during landing at Panenský Týnec (LKPC). The aircraft, manufactured in 1981, sustained partial damage to its rear fuselage and tail surfaces after the main landing gear retracted upon touchdown. The pilot, a 39-year-old male student pilot undergoing PPL(A) training, was not injured. ## Flight Progression and Landing Sequence The flight originated from Roudnice at 12:30 UTC as a solo navigation exercise. During the downwind leg for runway 09, the pilot extended the landing gear and visually checked the left main gear. The green indicator light for the extended gear position was illuminated. The AFIS dispatcher also observed the gear as extended prior to landing. Upon touchdown, the pilot noted unusual behavior, described as a sinking and deviation. Attempting a go-around was not possible due to low speed, and the aircraft ran off the runway into the grass on the left. ## Investigation Findings and Technical Analysis The investigation committee, led by Ing. Lubomír Stříhavka, examined the aircraft's landing gear system. Post-incident testing at a specialized facility revealed that all mechanical and electro-hydraulic components were in good condition and fully functional. The 'GEAR PUMP' circuit breaker, which was found tripped after the landing, was reset, and no leaks or electrical faults were detected. The system operated within the manufacturer's specified parameters, with gear extension times between 5.5 and 7 seconds. ## Probable Cause and Safety Context The source document does not explicitly state a final probable cause in the provided text. However, it notes that the pilot did not verify the functionality of the gear position indicator lights before the flight. The accident was classified as an aviation accident, and the aircraft was subsequently repaired according to the manufacturer's manual.