What was found
CORROSION ON THE INSIDE SURFACE OF LH ENGINE THRUST REVERSER PIVOT DOORS AND RH ENGINE THRUST REVERSER LOWER PIVOT DOOR AND INBOARD BEAM. REMOVED CORROSION AND VERIFIED REMAINING MATERIAL THICKNESS USING ULTRASONIC TESTING. APPLIED TREATMENT, PRIMER, AND TOP COAT AS REQUIRED BY THE MANUFACTURER. ALL WORK ACCOMPLISHED IAW NO. 907-623 REVISION B, . LH UPPER PIVOT DOOR MATERIAL THICKNESS WAS BEYOND SPEC AFTER CORROSION REMOVAL AND ULTRASONIC TESTING. ACCOMPLISHED CORROSION REPAIR, TREATMENT, PRIMER, AND TOP COAT OF LH UPPER PIVOT DOOR IAW RFTS-118596 REV 0 N857QS (700-0110).