As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION LEVEL 2 ON LOWER SILL UPPER SURFACE (CHANNELS 2EAS) BS 1640 TO 1681 AT CPAX WITH ORIGINAL THICKNESS OF 0.071 IN AND MINIMUM REMAINING THICKNESS OF 0.045 IN THEREFORE AREA IS OUT LIMITS IAW SRM 53-60-15-1A-1 PROCEDURE 1. CHANNELS 2EAS ON L4 LOWER SILL UPPER SURFACE BS 1640 TO 1681 WERE REPLACED IAW SRM 51-40-02-0G PAR 7.D. (LP 1697973 - AIRCRAFT WAS GROUNDED).