As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TYS DURING A SCHEDULED 1C INSPECTION THE RT UPPER STIFFENER ON THE APU FIREWALL WAS FOUND CRACKED. MAINT FABBED A DOUBLER AND STOPPED DRILL CRACK. INSTALL DOUBLER AT RT UPPER STIFFENER ON THE APU FIREWALL IAW EMB 135/145 SRM 55-32-13. ALL WORK WAS ACCOMPLISHED AND WILL BE RELEASED UPON COMPLETION OF ALL WORK.