What was found
DURING SCHEDULED INSPECTION AT AERO CORP IN LAKE CITY, FL FOUND THE AFT VENTRAL DOOR, FWD LOWER LT CORNER FRAME SECTION HAS 3 CRACKS APPROX .5 INCH LONG. ORDERED AND RECEIVED 3917854-503 FRAME 5929752-29 AND 9915565-313 SHIMS. REMOVED CRACKED FRAME IAW DC-9 SRM 51-10-4. FABRICATED REPAIR DOUBLERS IAW DC-9 SRM 51-02 FIG 2 AND TRAVELERS 1A-19487 AND 1A-19488. HEAT TREATED IAW DC-9 SRM 51-10-21. INSTALLED REPAIR DOUBLERS IAW DC-9 SRM 51-10-2. FIT AND DRILLED NEW FRAME IAW DC-9 SRM 51-10-4. INSTALLED FRAME IAW DC-9 SRM 51-30-2. COMPLIED WITH S/B 52-118 COND 2 REV 3 NDT INSP OF LOWER DOOR COMPLIED WITH. NON-ROUTINE REF NR 027N1-1173/60987.