Summary
We propose to supersede Airworthiness Directive (AD) 2005-15- 07, for certain Airbus Model A320-111 airplanes and Model A320-200 series airplanes. AD 2005-15-07 currently requires installing insulator and cable ties to the electrical cables of the S routes at the gaps in the raceway in the wing trailing edge and the wing tip and wing root areas. Since we issued AD 2005-15-07, we have received reports of wire chafing in the left-hand wing trailing edge. This proposed AD would require additional modifications in the trailing edges of both wings. This proposed AD would also remove airplanes from the applicability. We are proposing this AD to prevent wire chafing in the trailing edge of the wings, which could result in a short circuit in the vicinity of the fuel tanks, consequently resulting in a potential source of ignition in a fuel tank vapor space and consequent fuel tank explosion.