As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:C CORROSION ON SUPPORTING FRAME AT BS 420 UNDER BATTERY TRAY. TRAY ALSO HAS CORROSION AROUND MOUNTING LUG BRACKETS. REMOVED CORROSION AND INSTALLED REPAIR DOUBLER ON FRAME PER SRM 53-10-1. TRAY AND LUG BRACKETS WERE WITHIN LIMITS, ALL PARTS REINSTALLED PER SRM 51-30-2.