.-------.--------------------------------------.------------------------------. | FAULT | FAULT ORIGIN | CFDS MESSAGE | | CODE | | | |-------|--------------------------------------|------------------------------| |-------|--------------------------------------|------------------------------| | 74 | ACTUATOR RS422 ACTIVITY | | |-------|--------------------------------------|------------------------------| | 75 | ACTUATOR RS422 INTERRUPT | | |-------|--------------------------------------|------------------------------| | 76 | ACTUATOR DISCRETE MUX | OUTFLOW VALVE ELEC 1 (2) | |-------|--------------------------------------|------------------------------| | 77 | RVT EXCITATION | OUTFLOW VALVE ELEC 1 (2) | |-------|--------------------------------------|------------------------------| | 78 | RVT RANGE | OUTFLOW VALVE FDBK ASSY | |-------|--------------------------------------|------------------------------| | 79 | UNUSED | | |-------|--------------------------------------|------------------------------| | 80 | ACTUATOR A/D FRAME LATE | | |-------|--------------------------------------|------------------------------| | 81 | ACTUATOR LOOP CLOSURE | OUTFLOW VALVE ELEC 1 (2) | |-------|--------------------------------------|------------------------------| | 82 | ACTUATOR UNUSED INTER OCCURED | | |-------|--------------------------------------|------------------------------| | 83 | ACTUATOR ALU | OUTFLOW VALVE ELEC 1 (2) | |-------|--------------------------------------|------------------------------| | 84 | UNUSED | | |-------|--------------------------------------|------------------------------| | 85 | UNUSED | | |-------|--------------------------------------|------------------------------| | 86 | UNUSED | | |-------|--------------------------------------|------------------------------| | 87 | ACTUATOR PWR SUPPLY +15V OR A/D CONV | OUTFLOW VALVE ELEC 1 (2) | |-------|--------------------------------------|------------------------------| | 88 | ACTUATOR MOTOR HALL SENSOR | OUTFLOW VALVE AUTO MOT 1 (2) | |-------|--------------------------------------|------------------------------| | 89 | ACTUATOR S/W TIMER TOO EARLY | | |-------|--------------------------------------|------------------------------| | 90 | ACTUATOR ALT LIMIT SWITCH CLOSED | | |-------|--------------------------------------|------------------------------| | 91 | ACTUATOR RS422 CHECKSUM | | |-------|--------------------------------------|------------------------------| | 92 | UNUSED | | |-------|--------------------------------------|------------------------------| | 93 | UNUSED | | |-------|--------------------------------------|------------------------------| | 94 | UNUSED | | |-------|--------------------------------------|------------------------------|
 1EFF : ALL 1 21-31-00Page 71 1 1 Aug 01/05R 1 1 1CES 1

 .-------.--------------------------------------.------------------------------. | FAULT | FAULT ORIGIN | CFDS MESSAGE | | CODE | | | |-------|--------------------------------------|------------------------------| | 95 | UNUSED | | |_______|______________________________________|______________________________|
 E. MCDU Maintenance Messages
 NOTE : The details which follow are only applicable for:
____ -Cabin Pressure Controllers 9022-15702-10. If there is a failure, a maintenance message is shown on the MCDU. A failure in the CPCS can be class 1 or class 3. Class 1 failures require immediate maintenance action, as they always lead to a loss of the affected system with operational consequences. A class 3 failure is not as important, but should be observed for frequent recurance.
 (1) Class 1 Maintenance Messages
 NOTE : (XX) = the related fault code for shop maintenance.
____
 -------------------------------------------------------------------------------| BITE TEST |-----------------------------------------------------------------------------| | INDICATION ON THE MCDU | ATA REF. | BITE DETECTION | -------------------------------------------------------------------------------
PRESS CONTROLLER 1 (XX) 21-31-34 CPC 1 fault
 PRESS CONTROLLER 2 (XX) 21-31-34 CPC 2 fault
 OUTFLOW VALVE AUTO MOTOR 1 21-31-51 OFV auto motor 1 fault
 (XX
)

 OUTFLOW VALVE AUTO MOTOR 2 21-31-51 OFV auto motor 2 fault

 (XX
)