As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU FIREWALL IS CRACKED AT RT SIDE AT 1:00 O'CLOCK POSITION. FOUND CRACKED AREA AROUND RIVET IN PROFILE AREA. FABRICATED DOUBLER AND FILLER TO MAKE FINAL REPAIR. REMOVED CRACKED AREA AROUND UPPER PROFILE RIVET AREA. INSTALLED FILLER AND DOUBLER FOR FINAL REPAIR OF DAMAGED AREA.