What was found
MCN - MAJOR REPAIR - DURING C-17 CHECK EXFOLIATION CORROSION WAS FOUND ON UPPER SURFACE OF FLOOR BEAM (TEE CHORD) BS 986, RBL 20 - 40. MAINTENANCE REMOVED UPPER TEE CHORD OF FLOOR BEAM BS 986, RBL 3 - 49, FABRICATED 2 EACH SUPPORT ANGLES, 2 EACH STRAPS, 2 EACH SHEAR TIES, 6 CLIPS, AND A NEW UPPER TEE CHORD, AND INSTALLED REPAIR PARTS IAW AWA ER 03-5365-02219-TB3.