As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HEAVY CHECK, APU FIRWALL PANEL 351AZ UPPER AND LOWER FLANGES ARE CRACKED. MAINTENANCE REPAIRED PANEL IAW PROCEDURES IN J/C R1700E1-53-31-0001. PERFORMED HFEC INSPECTION OF REWORKED AREAS NO CRACKS FOUND AT THIS TIME RESTORED REWORKED TO ORIGINAL FINISH IAW SRM 51-23-04.