What was found
(CAN) DETECTED FIRST CUT AT REMOVAL OF TOW-BAR. DETECTED TWO MORE CUTS .50 INCH SPACED APPROX 10 INCHES FROM EACH OTHER, WHEN INSPECTING TIRE AFTER REMOVAL. IT WAS REPORTED THAT AIRCRAFT WAS LANDED ONCE WITH PILOT APPLYING BRAKES BEFORE NOSE GEAR TOUCHED GROUND. INSPECTED, NO SIGNS OF HARD LANDING. HOWEVER, DAMAGE MAY HAVE BEEN DONE WHEN APPROACHING AIRCRAFT WITH TOW-BAR OR AT HANGAR ENTRANCE, DOOR SILL HAVING HUMPER-GUIDES. NOTE: HANGAR DOORS BEING MODIFIED AND TRAINING GIVEN TO PERSONNEL ON HOOKING TOW BAR. (X)