THRUST REVERSER SYSTEM D/O (3)OTHER COMPONENTS DESCRIPTIONEach pivoting door is actuated by a hydraulic actuator supplied from theDCU. There is an internal locking mechanism in each actuator, which isthe secondary lock for the pivoting door.For each pivoting door a primary lock is installed on the front frame. Theprimary locks are locked mechanically when the pivoting door is stowed,and unlocked hydraulically to open.There is a stow switch and a Rotational Variable Transducer (RVT) foreach pivoting door to indicate the door position to the EEC. The stowswitches and RVTs send position signals to the EEC through the electricaljunction box.Four inhibition bolts are available to lock the pivoting doors in the stowedposition in case of thrust reverser deactivation.A ground safety switch is installed on the LH fan case and is accessiblethrough an access door in the cowl. The ground safety switch is connectedto the EEC and it is installed on the engine so that the maintenancetechnician can safely operate the thrust reverser during the operationaltest from the MCDU.