What was found
NR 1 AIR CONDITIONING COMP FUSELAGE SKIN, ANGLES; INTERCOSTAL WEB AND FASTENERS ARE CORRODED BETWEEN STA 562 AND STA 593; LONGERON 43L IMMEDIATELY OUTBOARD OF THE EXHAUST BOX. REPLACED CORRODED THROUGH LONGERON SECTION ACA 3353-3 LEFT BY SPLICING IN A NEW PIECE AT STA 561-593 IN REF TO DC/MD-10 SRM 53-00-01; FIG 7 AND EA 8-5310-117022 "FUSELAGE, A/C BAY LONGERON CORROSION AT STA 561-578 - REPAIR". CLEANED SKIN AND INTERCOSTAL AND UPON FURTHER EVALUATION FOUND NO CORROSION PRESENT. ALODINED AND PRIMED ALL BARE METAL IN REF TO DC/MD-10 SRM 51-21-01; VOL II; PGS 9; 21 AND 24. REPLACED 2 CORRODED CLIPS AND CORRODED HARDWARE IN REF TO DAC DWG ACA 3816 AND SRM 51-31-01; VOL II; .