Airworthiness Directive · Amendment 39-9991 · Airbus Model A310 and A300-600 Series Airplanes
Airbus Model A310 and A300-600 Series Airplanes
Model A310 and A300-600 series airplanes on which Airbus Modification 6403 (reference Airbus Service Bulletin A310-26- 2010 or A300-600-26-6011) has been installed; certificated in any category.
This amendment adopts a new airworthiness directive (AD), applicable to certain Airbus Model A310 and A300-600 series airplanes, that requires a functional flow test and leak test to verify if the pressure reducing valve in the cargo fire extinguishing system is in a serviceable condition, and replacement of any faulty valve with a new valve prior to extended range twin-engine operations of the airplane. This amendment is prompted by a report that, during a scheduled maintenance check, an inoperative pressure reducing valve was found in the cargo fire extinguishing system. The actions specified by this AD are intended to ensure that a faulty pressure reducing valve is not installed, which could result in reduced fire protection of the cargo compartment of the airplane.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
