What was found
PASSENGER CABIN FLOOR BEAM BS 294 HAS CORROSION ON UPPER CHORD FROM RBL 12 TO RBL 50. REMOVED CORROSION FROM THE UPPER CHORD FLOOR BEAM IAW B737 SRM 51-10-1. MATERIAL LOSS MORE THAN 50 PERCENT OUT OF LIMITS IAW SRM 53-10-1. FABRICATED NEW UPPER CHORD AND 10136-2101, 2 INCHES, 2.50 INCHES, AND 1.25 INCHES. FABRICATED ANGLES FROM 7075 T6 .063 INCH, 8.25 INCHES BY .8750 INCH BY .8750 INCH AND 11.50 INCHES BY 1 INCH AND .8750 INCH IAW B 737 SRM 53-10-9, FIG 5. INSTALLED IAW B 737 SRM 53-10-9, FIG 5. (X)