What was found
DISCREPANCY: DURING C-CHECK AT KDHN, CORROSION WAS FOUND ON THE FORWARD CARGO LOWER FUSELAGE BEAM AT STATION 579R – 579L ON THE FORWARD AND AFT ENDS. CORRECTIVE ACTION: COMMERCIAL JET CUT OUT THE DAMAGED SECTION OF THE FLOOR BEAM AT STATION 579 RBL 38.0 TO RBL 41.2, FABRICATED, LOCATED, DRILLED, DEBURRED, TREATED, PRIMED AND INSTALLED -1 REPAIR ANGLE, -2 REPAIR ANGLE, -3 FILLER AND -4 FILLER IAW ED20161 REV A AND DC9 SRM 51-10-4, 51-10-3 AND 51-60-0. FAA APPROVED PER 8110-3 ROBERT MANASHI DERT-710167-SW STRUCTURES DATED 5/22/2020.