As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLE MAINTENANCE DURING ACCOMPLISHMENT OF SB 145-49-009 AND 145-49-0018 MAINTENANCE FOUND THE APU FIREWALL WAS CRACKED. THE AIRCRAFT WAS RELEASED IAW EMBRAER AUTHORIZATION GST 2647/01. MAINTENANCE REPLACED THE APU FIREWALL. OPERATIONAL CHECKS WERE GOOD OF THE APU.