What was found
(A3NB-53-4-6179 A-41 DOT 150) AFT CARGO STGR 39R BETWEEN FR56 A N FR58 IS CORRODED. NONROUTINE 9020983 REMOVED FASTNERS AT STR 39R FR56-58 IAW SRM 51-42-11-006 CLEANED STRINGER IAW SRM 51-75-00 AT STR39 FR56-58 AND FOUND TO BE OUT OF LIMITS IAW SRM 53-00-13-300-002, NEW MATERIAL ID PART NUMBER DAN308-08 LOT NO.R 189260 P.O.1587035. FABRICATED STRINGER REPLACEMENT IAW SRM 51-72-11-911-001, OK TO TREAT NOUTINE 9020983 IAW UAER5100R01017 REV E AND SRM 51-75-12-911-001 NOR ED STR39 FR56-58 IAW SRM 51-72-11-911-001 APPLIED TOP COAT AND PRIME ALODINED AND PRIMED IAW SRM 51-21-11-001. INSTALL