What was found
DURING C-CHECK AT AERO CORP, FOUND HOLE CORRODED IN FLOOR BEAM/FRAME AT STA 986.5 AFT SIDE 24 INCHES OF CENTER LINE. REMOVED FLOOR BOARDS FOR ACCESS, MECHANIC REMOVED THE CORROSION FROM FLOOR BEAM IAW B 737 SRM 51-10-6. MATERIAL LOSS OF .079 INCH, OUT OF LIMITS IAW SRM 53-10-1. ULTRASONIC INSPECTION HIGH READING .125 INCH, LOW READING .046 INCH PER 51-00-00. REMOVED EXISITNG BEAM REPAIR IAW B 737 51-30-2. FABRICATED REPAIR PARTS, TREATED AND PRIMED IAW B 737 53-10-9 AND 51-20-11. INSTALLED REPAIR IAW B 737 SRM'S 51-20-2 AND 53-10-1. INSTALLED FLOOR BOARDS AND TORQUED IAW B 737 SRM 51-30-2 AND MM 53-21-0. (X)