What was found
MCN - MAJOR REPAIR - DURING C19 CHECK DISCOVERED CRACK, .66 INCHES, ON THE LOWER FLOOR BEAM STRAP AT BS 312, WL 200 AND BL 26R. MAINTENANCE REMOVED AND INSTALLED NEW STRAP AT BS 312, WL 200 AND BL 26R IAW BOEING 737-300 SRM 51-40-02-0G FIGURES 3, 4, 8 AND 12.