Summary
This document proposes the supersedure of an existing airworthiness directive (AD), applicable to certain Airbus Model A300- B2 and -B4 series airplanes that currently requires an inspection to detect discrepancies of a certain thrust reverser control lever spring; an operational test to verify the integrity of the flight inhibition circuit of the thrust reverser system; and either the correction of discrepancies or deactivation of the associated thrust reverser. That AD also provides for an optional terminating action. That AD was prompted by a report that, due to broken and deformed thrust reverser control lever springs, an uncommanded movement of the thrust reverser lever to the unlock position and a ``reverser unlock'' amber warning occurred on one airplane. The actions specified by that AD are intended to detect such broken or deformed control lever springs before they lead to uncommanded deployment of a thrust reverser and consequent reduced controllability of the airplane. This proposal would require installation of the previously optional terminating action in accordance with the latest service information.