As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLOOR SUPPORT BETWEEN STA 312 TO 320 LBL5 HAS CORROSION ON UPPER SURFACE AFT SIDE. EVALUATED FLOOR SUPPORT BETWEEN STA 312 TO 320 LBL5, ORIGINAL MATERIAL THICKNESS 0.080, REMAINING MATERIAL THICKNESS 0.060, LOSS MATERIAL 0.020, OUT OF LIMITS IAW B737-800 SRM 53-10-51-1A- 1 ALLOWABLE DAMAGE 1 SECTION 41 FIG. 105 DETAIL C SHEET 1. REMOVED AND REPLACED FLOOR SUPPORT IAW SRM 51-40-02 AND SRM 51-40-05.