Summary
We propose to adopt a new airworthiness directive (AD) for all Airbus Model A300 B4-600, B4-600R, and F4-600R series airplanes, and Model A300 C4-605R Variant F airplanes (collectively called Model A300- 600 series airplanes); and Airbus Model A310 series airplanes. This proposed AD was prompted by fuel system reviews conducted by the European Aviation Safety Agency (EASA). This proposed AD would require modifying the electrical control circuits of the inner, center, and trim tank pumps, as applicable. We are proposing this AD to reduce the potential of ignition sources inside fuel tanks, which, in combination with flammable fuel vapors, could result in fuel tank explosions and consequent loss of the airplane.