AD NUMBER: 2012-09-12
PRODUCT: Certain Airbus Model A319-111, -112, -113, -114, -115, -131, -132, and -133 airplanes; Model A320-111, -211, -212, -214, -231, -232, and -233 airplanes; and Model A321-111, -112, and -131 airplanes; equipped with an additional center tank (ACT)