What was found
MCN - MAJOR REPAIR - DURING C-17 CHECK OIL CANNING WAS DISCOVERED ON THE AFT PRESSURE BULKHEAD BS 1016, RBL 54, BETWEEN STR 11 R/H AND STR 13 R/H, CANNING CONCAVED FORWARD. MAINTENANCE REMOVED BOLTS FROM STR 11 R/H TO STR 14 R/H, FABRICATED AND INSTALLED SHIMS AT STR 11 - 13 R/H. REINSTALLED AND TORQUED BOLTS, CANING NO LONGER EXISTS. REPAIR ACCOMPLISHED IAW AWA E.R. 03-5383-02291-ES1.