Summary
This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Airbus Model A300-B2 and - B4 series airplanes. This proposal would require 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 correction of discrepancies or deactivation of the associated thrust reverser. This proposal is prompted by a report indicating 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 the proposed AD are intended to detect such broken or deformed control lever springs before they can lead to uncommanded deployment of a thrust reverser subsequent reduced controllability of the airplane.