As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU COMPARTMENT AIR INLET OPENING, FWD AND AFT VERTICAL FLANGE AND AFT VERTICAL ANGLE ARE CORRODED. GROUNDED - YES. CLEANED ALL PARTS LISTED IN DISCREPANCY IAW BSOPM 20 30 03, CORR ONLY NOTED ON AFT VERTICAL STIFFENER. REMOVED AND REPLACED AFT VERTICAL STIFFENER IAW SRM 51 40 02 0G 0 FOUND TO HAVE 100% MATL LOSS W 2 O .060 R 0 L 4 D 100%.