As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#1979, DCA-FLL. 'WHILE CHECKING NRU BOWL PER TASK CARD A320-21-26-43-710-001. FOUND CORROSION AROUND SKIN AIR INLET VALVE; CORROSION FOUND TO BE ON INLET DUCT FLANGE ONLY NOT ON AIRCRAFT SKIN. REMOVED AND REPLACED SKIN AIR DUCT ASSY IAW AMM 21-26-00.'