Airworthiness Directives; Airbus Airplanes

We propose to adopt a new airworthiness directive (AD) for certain Airbus Model A319-115 and -132 airplanes, and Model A320-214, - 216, -232, and -233 airplanes. This proposed AD was prompted by a report indicating that certain modified airplanes do not have electrical ground wires on the fuel level sensing control unit (FLSCU), which adversely affects the fuel gravity feeding operation. This proposed AD would require modification of the FLSCU wiring. We are proposing this AD to address the unsafe condition on these products.