As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHV-DURING C-CHECK APU FIREWALL HAS MULTIPLE CRACKS (4) AROUND RIVETS. MAINTENANCE STOP DRILL CRACKS PER SRM 51-10-02 AND INSTALL DOUBLER SIZE TO ENCOMPASS CRACKS USING PRINCIPLES DESCRIBE IN SRM 53-32-12 ITEM 6 AND USING EC 5330-01473.THE AIRCRAFT WAS APPROVE FOR RETURN TO SERVICE