As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON RT APU ACCESS DOOR INTERNAL AND EXTERNAL SKIN. THE APU DOOR THAT WAS REMOVED WITH THE PART NUMBER 5914694-95 AND SERIAL NUMBER: DL14 AND THE SERVICEABLE DOOR WITH THE PART NUMBER 5914694-501 AND SERIAL NUMBER DL9 WAS REPLACED PER CMM 52-44-1 CORROSION LEVEL 2.