What was found
CORROSION OUT OF LIMITS, THICKNESS MEASUREMENT WAS ACCOMPLISHED ON FLOOR STRINGERS UPPER/LWR (ATTACH POINTS) 2.9, 7.55 & 10.45 LBL/RBL AND BTW BS 1508 TO BS 1511 OF FLOOR STRUCTURE AT AFT CARGO COMPARTMENT PER SRM 53-00 -53-1A PROCEDURE 1, ALLOWABLE DAMAGE 1 FIGURE 101, DETAIL IX. AND B757 NDT MANUAL PART 51-00-10 PAR. 4. A. CORROSION LEVEL 2. FLOOR STRINGERS UPPER/ LWR (ATTACH POINTS) 2.9, 7.55 & 10.45 LBL/RBL AND BTW BS 1508 TO BS 1511 OF FLOOR STRUCTURE AT AFT CARGO COMPARTMENT WERE REPAIRED PER B757-300 SRM 53-00-53-2R PROCEDURE 1 REPAIR 1 (1580827) AIRCRAFT WAS GROUNDED