Piper PA-28RT-201T Turbo Cherokee Arrow IV, G-OPJD
On approach to Thruxton Airfield, the pilot was unable to obtain a green DOWN-AND-LOCKED indication for the right Main Landing Gear (MLG). Despite several attempts to recycle the gear, he was unable to obtain the correct indication and eventually landed, during which the right MLG collapsed. It was found that a broken seal in a valve which allows the gear to free-fall was preventing normal hydraulic extension and that a stiff downlock hook mechanism was hampering engagement of the downlock when extending under gravity.
Date of occurrence: 14 January 2014