What was found
DURING C-CHECK AT AERO CORP, FOUND PASSENGER CABIN FLOOR BEAM LONGITUDINAL SUPPORT AT LBL 12 HAS CORROSION AT BS 310. REMOVED FLOOR BEAM AT LBL 12 IAW B 737 SRM 51-30-2. FABRICATED NEW FLOOR SUPPORT IAW B 737 SRM 53-40-4. TREATED AND PRIMED IAW B 737 SRM 51-10-2 AND MM 51-20-11. INSTALLED FLOOR SUPPORT AT LBL 12 BS 310 IAW B 737 SRM 51-30-2. (X)