What was found
LCQ - MAJOR REPAIR - DURING C-15 CHECK CORROSION WAS FOUND ON FLOOR SUPPORT BEAM AND NUTPLATES IN THE AFT CARGO COMPARTMENT AT BS 727D+6, LBL 7.5. MAINTENANCE REMOVED CORROSION IAW B737-300 SRM 51-10-2, PG. 24, FABRICATED 2 EACH REPAIR ANGLES FROM 7075-0-.071, 7075-0-.080, HEAT TREATED TO 7075-T6, PRIMED, AND INSTALLED REPAIR PARTS AT BS 727D+6, LBL 7.5 IAW B737-300 SRM 53-00-53, FIG. 201, PG. 203.