What was found
(CAN) FOUR CRACKS FOUND IN 4 REINFORCEMENT PLATES, STEEL, RT & LT, FWD & AFT OF LANDING GEAR BULKHEAD ASSEMBLY. BULKHEAD UNDER THE REINFORCEMENT PLATES CRACKED AS WELL. CAUSES UNKNOWN BUT MANY CYCLES DONE IN THE LAST 20 YEARS BECAUSE OF GLIDER TOWING.