What was found
DURING SCHEDULED INSPECTION AT AERO CORP IN LAKE CITY, FL FOUND AFT PRESSURE BULKHEAD MAIN FRAME STATION 996 RBL 56 CORRODED AT FASTENER HOLE. DC9 SRM 53-01 FIG 1 REVEALED CORROSION LIMITS (MICROMETER A-1729). CUT OUT CORRODED FRAME IAW DC9 SRM 51-10-2. FABRICATED 1 CHIP SPLICE (7075T6) AND 1 EACH FRAME SECTION (7075T6). ANNEALED AND FORMED PARTS IAW DC9 SRM 51-10-2 AND 51-10-2A. HEAT TREATED PARTS IAW DC9 SRM 51-10-2A. DRILLED, DEBURRED, FIT AND TRIMMED PARTS IAW DC9 SRM 51-10-4, 51-10-2. ALODINED AND PRIMED PARTS IAW DC9 SRM 51-10-3. INSTALLED PARTS IAW DC9 SRM 51-30-2, 51-30-1. INSTALLED ISOLATORS IAW RES 1 02780.