Summary
The FAA proposes to supersede an existing airworthiness directive (AD) that applies to certain Airbus Model A318-100, A319-100, A320-200, A321-100, and A321-200 series airplanes; and Model A320-111 airplanes. The existing AD currently requires modification of the electrical bonding of all structures and systems installed inside the center fuel tank. That AD results from fuel system reviews conducted by the manufacturer. This proposed AD would require modification of additional bonding points inside the center fuel tank. This proposed AD results from a report that additional bonding points need to be modified in order to prevent electrical arcing in the center fuel tank. We are proposing this AD to prevent electrical arcing in the center fuel tank due to inadequate bonding, which could result in an explosion of the center fuel tank and consequent loss of the airplane.