As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RT APU FIREWALL 351BZ HAS 0.360" CRACK AT UPPER ANGLE AND 0.480" AT LOWER ANGLE. BOTH CRACKS ROUTED OUT AND NDT PERFORMED VERIFYING NO MORE CRACKING EXISTS ON WO 553865-307 IAW ETD 2012-170-007631 AND COMPASS EA E170-53-010, REV IR WO 572571.