As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING HMBV INSPECTION FOUND THE APU FIREWALL CRACKED AT THE TOP RT MOUNTING POINT & ABOVE THE TOP RIVET ON THE RT SIDE RIVET ROW. COMPLETED FABRICATION & INSTALLED NEW DOUBLER AT TOP RT MOUNTING POINT IAW EO EM-53AD-1883 & ETN EM-53-244. COMPLETED REPAIR OF APU FIREWALL IAW EO EM-53AD-1883 PART C STEPS 81 THRU 1.