What was found
APU COMPARTMENT INTERNAL SKIN HAS UNIDENTIFIED HOLE ABOUT 3/8", BETWEEN FS 1918.9 & 1941, AT 1 (ONE) O'CLOCK POSITION. REMOVED APU COMP. SKIN FROM STA. 1918.9 TO 1941 TO FOM IAW SRM 51-40-02, REPAIR SKIN IAW SRM 51-70-10 AND REINSTALLED IAW SRM 51-40-02 AND 51-40-00, THIS A MAJOR REPAIR NO FOLOW-UP INSPECTION REQUIRED.