As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STR ATA 53-00 WHILE WORKING LINE# 816 T3F18E006KWYG AT THE APU AERA DOOR HOUSING TOP OF HORZ. STAB CENTER SECTION FOUND CORROSION AT ANGLE UNDER NUTPLATES. INSTALLED FORWARD STRAP P/N 148N3138-20SAAU AND LOWER ANGLE SUPPORT P/N 148N3152-1SAAU FOR APU INLET FWD DOOR HOUSING REF. B-757 SRM 51-40-02-0G-0. REVIEWED