As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU COMPARTMENT BS 1885.20 LOWER MID-SECTION AT FIREWALL, RT SIDE EXISTING DOUBLER HAS DEEP GOUGE. REMOVED EXISTING DOUBLER AT FIREWALL IAW SRM 51-40-02. FABRICATED NEW DOUBLER FROM PN TI-6AL-4V .025, PO 956AT-00176. DIMENSIONS ARE 6.5" X 3.85". IAW SRM 53-80-08 & SRM 51-40-05. INSTALLED NEW DOUBLER IAW SRM-51-40-02 & SRM-53-80-08 REPAIR 2 FIG 201.