As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHV - DURING C-CHECK MAINTENANCE FOUND APU FIREWALL CRACKED AT THE RIGHT HAND LOWER MOUNT. MAINTENANCE INSTALLED DOUBLER ON THE APU FIREWALL AT THE RIGHT HAND LOWER MOUNT IAW EMB SRM 53-32-13. AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.