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General
The IDENT/CONFIG page of APU BITE TEST shows APU and
ECU configuration and identification data. There are two pages
of this data. Page one shows the APU data. Page two shows
ECU data.
The CDU shows the page number in the upper right corner of
the display. Next to this number you see the total number of
pages in IDENT/CONFIG.
IDENT/CONFIG Page 1
The IDENT/CONFIG page 1 gives this APU identification and
configuration data:
* APU serial number
* APU hours
* APU cycles
* APU hours since installation on airplane.
You reset the APU hours since installation on the airplane when
you select the line select key next to RESET HOURS SINCE
INSTALLATION. You should reset the hours since installation
when you replace the APU.
IDENT /CONFIG Page 2
The IDENT/CONFIG page 2 gives this data about the ECU:
* ECU part number
* ECU serial number
* ECU operational software part number.
You select the line select key next to DATA MEMORY MODULE
to see the data stored in the data memory module (DMM). There
are 12 pages of DMM data. The DMM records data about the
health of the APU. This data is used during overhaul and is not
needed for line maintenance. The DMM data is not shown here.
APU CONTROLS - ELECTRONIC CONTROL UNIT - TRAINING INFORMATION POINTS - IDENT CONFIG
EFFECTIVITY
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APU CONTROLS - ELECTRONIC CONTROL UNIT - TRAINING INFORMATION POINTS - IDENT CONFIG
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THIS PAGE IS INTENTIONALLY LEFT BLANK
APU CONTROLS - ELECTRONIC CONTROL UNIT - TRAINING INFORMATION POINTS - IDENT CONFIG
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
General
The INPUT MONITORING page of APU BITE TEST shows APU
and airplane interface data. You use this data for
troubleshooting of the APU and APU interfaces.
The CDU shows the page number in the upper right corner of
the display. The second number is the total number of pages in
INPUT MONITORING.
INPUT MONITORING Page 1
INPUT MONITORING page 1 shows this APU data:
* SPEED (the speed the APU turns)
* EGT (exhaust gas temperature)
* IGV POSITION (inlet guide vane position with 90 degrees as
open)
* SCV POSITION (surge control valve position with 90 degrees
as full closed)
* DELTA PRESS (differential pressure in bleed duct)
* TOTAL PRESS (total pressure in bleed duct)
* INLET PRESS (APU air inlet pressure)
* INLET TEMP (APU air inlet temperature)
* FUEL TMC (fuel control unit metering valve torque motor
current)
* FUEL FLOW.
INPUT MONITORING Page 2
INPUT MONITORING page 2 shows this APU data:
* APU Oil temperature
* FUEL TEMP (APU fuel temperature)
* GENERATOR LOAD (starter-generator load)
* START SWITCH (APU switch in START position, YES/NO)
* APU ON SWITCH (APU switch in ON position, YES/NO)
* APU OFF SWITCH (APU switch in OFF position, YES/NO)
* MES SWITCH(S) (main engine start switch positions, OFF/1/
2/BOTH)
* AIR/GROUND (airplane in air or on ground, AIR/GRD)
* LEFT PACK (left pack mode, OFF/LOW/HIGH)
* RIGHT PACK (right pack mode, OFF/LOW/HIGH).
INPUT MONITORING Page 3
INPUT MONITORING page 3 shows this APU data:
* BLEED COMMAND SWITCH position
* APU Bleed switch position, ON/OFF)
* INLET DOOR OPEN (APU air inlet door open, YES/NO)
* DOOR NOT FULL OPEN (APU air inlet door not full open,
YES/NO)
* FIRE COCKPIT (flight compartment fire handle pulled, YES/
NO)
* FIRE REMOTE HANDLE (remote fire handle pulled, YES/NO)
* FIRE DETECTION (fire detected by fire detection system,
YES/NO)
* AIRPLANE MODEL (600/700/800)
* BLEED AIR VALVE (bleed air valve position, OPEN/CLOSE)
* FUEL VALVE CLOSED (fuel shutoff valve in closed position,
YES/NO)
* FUEL VALVE OPEN (fuel shutoff valve in open position, YES/
NO).
APU CONTROLS - ELECTRONIC CONTROL UNIT - TRAINING INFORMATION POINTS - INPUT MONITORING
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