What was found
DURING HEAVY MAINTENANCE, CORROSION WAS DISCOVERED ON STRINGER LOCATED BTW FR 58 TO FR 59 AT STRINGER 42L IN AFT CARGO; PERFORMED REPAIR ON STR 42L BTW FR 58 TO FR 59 IN AFT CARGO COMPARTMENT IAW SRM 53-00-13-300-001 AND MUST BE REINSPECTED AT 60,000 FC, 120,000 FH IAW SRI 53-00-13-205-001 TABLE 005 REF NR 2018-250283.