As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PAE - FLT 7838 - DURING ROUTINE MAINTENANCE CHECK, FOUND TWO AREAS OF CORROSION ON BOTH LOWER CORNERS OF THE APU INLET DOOR OPENING IN APU CAVITY. LOWER STRINGER OUT OF LIMITS. REMOVED AND REPLACED STRINGER PER IAW SRM 51-40-02 AND 52-80-14. (M)