What was found
AFTER CORROSION REMOVAL, MEASUREMENT THICKNESS WAS ACOMPLISHED ON INTERCOSTAL BTW STA 1400 TO 1420 AND STGR 29R BILGE AREA AFT CARGO COMPARTEMENT, THEREFORE IT IS OUT OF LIMITS PER B757-300 SRM 53-00-04-1A PROCEDURE 1, NOTE F, DETAIL II. CORROSION LEVEL 2. INTERCOSTAL BTW STA 1400 TO 1420 AND STGR 29R BILGE AREA AFT CARGO COMPARTEMENT WAS REPLACED PER B757-300 SRM 51-40-02-0G PAR 7. (1580326) AIRCRAFT WAS GROUNDED