As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU AIR INLET DOOR CUT OUT- FWD STRAP CORRODED AT BS 1787, STRINGERS 3 - 6R. APU AIR INLET DOOR CUT OUT FWD STRAP CORROSION REMOVED FOUND OUT OF LIMIT AS PER SRM 53-80-08-1A FIG 101 DETAIL 1X REV 118.0 CORRODED FWD STRAP REMOVED AND REPLACED WITH NEW FWD STRAP P/NO 148N3138-20 AS PER BOEING DWG NO 148N3105 SHT 1 REV C. REPAIR CLASSIFIED AS MAJOR