What was found
AFT AVIONICS BAY LEFT HAND SKIN AIR INLET VALVE LOCATION, INTERNAL DOUBLER AROUND CUTOUT IS CORRODED GROUNDED - YES. REMOVED AND REPLACED INTERNAL DOUBLER IAW AIRBUS DWG D53113482 AND A320 SRM 51-42-11. NO ALLOWABLE LIMITS FOR AREA. REMOVED AND INSTALLED FILTER HOUSING IAW A320 AMM 21-26-43, REMOVED AND INSTALLED 3 EA STRINGERS AND 2 EA CLIPS IAW AIRBUS DWG D53113482. REMOVED AND INSTALLED DUCT ASSY P/N D5391673600051 IAW A320 SRM 51-42-11. REMOVED AND INSTALLED SKIN AIR VALVE IAW A320 AMM 21-26-52. OPS CHECK PERFORMED IAW A320 AMM 21-26-00, OPS CHECK GOOD. CATEGORY A REPAIR.