As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHV - DURING C-CHECK THE APU FIREWALL WAS FOUND TO BE CHAFED AT THE 6 O'CLOCK POSITION. MAINTENANCE REMOVED THE DAMAGED AREA AND INSTALLED A DOUBLER REPAIR IAW EC5310-01359, REPAIR 1.2, FIG 2.1. THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.