Airworthiness Directive · Amendment 39-13896 · Airbus Model A318, A319, A320, and A321 Series Airplanes
Airbus Model A318, A319, A320, and A321 Series Airplanes
This AD applies to Airbus Model A318, A319, A320, and A321 series airplanes, certificated in any category; on which Airbus Modification 27620 (reference Airbus Service Bulletin A320-34-1261) has been done.
The FAA is adopting a new airworthiness directive (AD) for certain Airbus Model A318, A319, A320, and A321 series airplanes. This AD requires regularly performing a complete electrical shutdown of the airplane to reset the integrated standby instrument system (ISIS). This AD is prompted by reports indicating that an airplane lost the ISIS, then, during the same flight, lost all electronic instrument system (EIS) display units. We are issuing this AD to prevent loss of the ISIS, which, if combined with loss of all EIS display units, could reduce the flightcrew's situational awareness and contribute to loss of control of the airplane or impact with obstacles or terrain.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Within 3 days after the effective date of this AD, or within 5 days after the last ISIS reset or complete electrical shutdown of the airplane, whichever is first, perform a complete electrical shutdown of the airplane to reset the ISIS. Repeat the electrical shutdown of the airplane at intervals not to exceed 5 days.
Note 1: This AD does not allow resetting the circuit breaker as a means of resetting the ISIS.
Note 2: There is no terminating action available at this time for the requirement to regularly perform a complete electrical shutdown of the airplane.
