As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(B757-53-3-6129) MAIN AFT CABIN FLOOR HAT CHANNEL BETWEEN STA 16 60 AND STA 1680 BL0 HAS CORROSION ON UPPER SURFACE AT MULTIPLE AREAS. 209-52 REMOVED AND REPLACED FLOOR HAT CHANNEL AT MAIN CABIN STA 1660 AN D STA 1680, BL0 IN ACCORDANCE WITH B757-200 SRM 51-40-02 PG 2 D UE TO UPON FURTHER EVALUATION FOUND HAT CHANNEL AT 15% EXFOLIATE D AND OUT OF LIMITS IAW 757-200 SRM 53-00-51.