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 40595 L1 PAX DOOR SILL AT FRAME 16 STR 23L. HAS 4 EA AREAS OF CORROSION AROUND GIRT BAR FITTING ATTACH HOLES; REF NR 40595 REMOVED AREA OF CORROSION AREA IS OUT OF LIMITS AT AFT O/B ATTACH HOLE REMOVED AND REPLACED L1 PAX DOOR SILL IAW SRM 53-11-14.