Summary
This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Airbus Model A300-600 and A310 series airplanes. This proposal would require an inspection to detect defects of the directional pilot valves (DPV); and replacement of any defective DPV with a new DPV, or deactivation of the thrust reverser system, if necessary. This proposal is prompted by a report indicating that, during a maintenance check, an uncommanded deployment and stowage of the thrust reverser occurred due to improperly modified DPV's. The actions specified by the proposed AD are intended to prevent uncommanded deployment and stowage of the thrust reverser during maintenance activities, as a result of improperly modified DPV's, which could result in injury to maintenance personnel or other people on the ground.