As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY MAINTENANCE, CORROSION WAS DISCOVERED ON REF NR 40594 L1 PAX DOOR SILL AT FRAME 20 STR 23L. HAS 4 EA AREAS OF CORROSION AROUND GIRT BAR FITTING ATTACH HOLES; REF NR 40594 PREVIOUSLY BLENDED AREA AT AFT O/B LOCATION IS NOT IAW SRM 53-11-14-283-005 L1 DOOR SILL BEING REPLACED ON NR 440496/40595.