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T/R INDICATING AND FAULT DETECTION -FUNCTIONAL DESCRIPTION -PSEU INPUTS
General
The proximity sensor electronics unit (PSEU) gets data from these sensors to make sure the actuators and valves are in the correct positions:
*
Directional control valve (DCV) proximity sensor
*
Actuator lock proximity sensor
*
Sync lock proximity sensor.
The PSEU sends signals to the airplane information management system (AIMS) through the systems ARINC 629 data buses.
Sensors Show Not Locked
If any of the locks are not locked and the sleeve is in the retracted position, the AIMS shows advisory and status messages.
If the directional control valve (DCV) is in the extended position without an extend command, the AIMS shows advisory and status messages.
Sensor Failure
If there is a single failure in a sensor, or in a sensor circuit, the AIMS shows the ENG REVERSER SNSR L(R) status message. The AIMS also makes a central maintenance computer system (CMCS) maintenance message.
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BOEING PROPRIETARY -Copyright # -Unpublished Work -See title page for details.
T/R INDICATING AND FAULT DETECTION -FUNCTIONAL DESCRIPTION -PSEU INPUTS
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