What was found
LEFT LANDING GEAR FAILED TO EXTEND FOR LANDING. PILOT UNSUCCESSFULLY ATTEMPTED TO LOWER LANDING GEAR (WHILE IN CONTACT WITH MAINTENANCE) SEVERAL TIMES. PILOT LANDED AIRCRAFT WITH GEAR RETRACTED. AIRCRAFT SUSTAINED DAMAGE TO THE LOWER FUSELAGE, LOWER RIGHT NACELLE AND PROPELLERS. INITIAL INSPECTION REVEALED LEFT TORQUE SHAFT SHEARED INBOARD OF LANDING GEAR ACTUATOR ATTACH POINT DUE TO LEFT LANDING GEAR ACTUATOR INTERNAL FAILURE. NO DISASSEMBLY OF ACTUATOR PERFORMED. CAUSE OF FAILURE UNDETERMINED. (X)