What was found
MCN - DURING C24 CHECK DISCOVERED LEVEL 2 CORROSION ON DOUBLER ON UPPER SIDE OF B/S FRAME 294.5, BL 57R AND RT OUTBOARD END AT CIRCUMFERENTIAL. MAINTENANCE REMOVED CORROSION ON UPPER SIDE OF B/S FRAME 294.5, RT O/B END AND DETERMINED IT TO BE OUT OF LIMITS IAW B737-300 SRM 53-10-15-1A1, FIG 101. REMOVED, FABRICATED AND REPLACED DOUBLER ON UPPER SIDE OF B/S FRAME 294.5, BL 57R AND RT O/B END AT CIRCUMFERENTIAL IAW B737-300 SRM 51-40-02-0G, PAR 4, FIG'S 3, 4, 6, 7, 8 AND BAC DWG 65-45875.