What was found
DURING C-4 CHECK, INSPECTION REPORTED SURFACE CORROSION ON AFT CARGO COMPARTMENT FLOOR SUPPORT CHANNEL AT APPROX. STA. 727C, RBBL 3. REPLACED DAMAGED FLOOR SUPPORT CHANNEL FROM STA. 727 - 847, RBBL 3, IAW SRM 53-60-53, 51-10-02 AND 51-40-02.