What was found
DURING HEAVY MAINTENANCE, CORROSION WAS DISCOVERED ON COVER SHEET OTBD EDGE FRAMES 53 - 54. REMOVED AND REPLACED AFT CARGO DOOR SILL COVER PLATE IAW SRM 57-72-11, 53-41-49, FIG 004, 53-41-49-283-004.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING HEAVY MAINTENANCE, CORROSION WAS DISCOVERED ON COVER SHEET OTBD EDGE FRAMES 53 - 54. REMOVED AND REPLACED AFT CARGO DOOR SILL COVER PLATE IAW SRM 57-72-11, 53-41-49, FIG 004, 53-41-49-283-004.