What was found
AT D-CHECK, AFT PRESSURE BULKHEAD FWD FACE STIFFENER RIB BELOW CABIN FLOOR LBL 8 CRACKED AT RADIUS BOTH UPPER AND LOWER END. REMOVED STIFFENER, FABRICATED NEW STIFFENER PER SRM 53-0175, 27.25 LONG. INSTALLED PARTS PER S/B 53-0175 REPAIR AND PREVENTATIVE MOD PER DRAWING 65C29080.