Airworthiness Directive · Amendment 39-9948 · Airbus Model A320 Series Airplanes
Airbus Model A320 Series Airplanes
Model A320 series airplanes; on which a generator control unit (GCU) having part number (P/N) 520915 has not been installed, or on which Airbus Modification 21052 (reference Airbus Service Bulletin A320-24-1022) and Airbus Modification 21736 (reference Airbus Service Bulletin A320-24-1035) have not been accomplished; certificated in any category.
This amendment supersedes an existing airworthiness directive (AD), applicable to certain Airbus Model A320-111, -211, and -231 series airplanes, that currently requires replacing the existing standby generator control unit (GCU) with a new improved standby GCU. That action was prompted by reports of improper functioning of the standby GCU. This amendment requires replacement of the GCU on addition affected airplanes. For some airplanes, it also will require that a wiring modification be accomplished prior to replacement of the GCU. The actions specified by this AD are intended to prevent such improper functioning of the GCU, which could result in the loss of the standby emergency generation system.
