Summary
This document proposes the supersedure of an existing airworthiness directive (AD), applicable to certain Airbus Model A310 and A300-600 series airplanes, that currently requires wiring modifications to the engine and auxiliary power unit (APU) fire detection system. This action would require new wiring modifications for the engine and APU fire detection system. This proposal is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by the proposed AD are intended to prevent the fire warning from terminating prematurely, which could result in an unnoticed, uncontained engine/APU fire.