As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C-CHECK THE APU FIREWALL WAS FOUND TO BE CRACKED AT THE RT UPPER APU MOUNT. MAINTENANCE REMOVED THE DAMAGED AREA AND PERFORMED A DOUBLER REPAIR IAW EMB 145 SRM 53-32-13 SECTION 4 FIGURE 203. THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.