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 (EXT SKIN) HAS CRACKS FROM RT UPPER MOUNT AT STIFFENER ENDS AND FROM RIVET HEADS TO RT LOWER MOUNT, AND (2) EACH ON LT SIDE AT 9 O'CLOCK POSITION. MAINTENANCE REPAIRED APU FIREWALL IAW EMB-145 EC 5330-02226. THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.