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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
General
To do a check of FMCS discretes status, select DISCRETES on
LSK 4L, from the FMCS BITE page.
Discretes Pages
These pages shows the current status of the analog discretes
that send data to the FMC.
These are the discretes that you can see on page 1:
* ECS PACK. Shows the position of the ECS flow control and
shut off valve in each pack.
* ECS PACK H/L. Shows if the pack is in normal or high flow
mode.
* ISOL VALVE. Shows the position of the bleed air isolation
valve.
* COWL A/ICE. Shows the position of the engine cowl anti-ice
switches on the P5 overhead panel.
* WING A/ICE. Shows the position of the wing anti-ice switches
on the P5 overhead panel.
* OLEO SWITCH. Shows the airplane in the ground or air
modes. This input comes from the proximity switch
electronic unit (PSEU).
These are the discretes that you can see on page 2:
* FAA/JAA FLIGHT RULES - This option sets the CG for the
applicable regulatory flight rules.
* KILOGRAM OPTION - This option sets the default for weight
entries on the CDU.
* MAG/TRUE - This option is not used.
* SRCE/DEST IDENT. This option is used to identify the FMC. It
is always configured to left.
* ASPIRATED TAT - This option is enabled when an aspirated
TAT probe is installed on the airplane.
* DEGREE C/DEGREE F DEFAULT. This option sets the default
for temperature entries on the CDU.
* PERF CODE - This option sets the performance code for the
FMC. It is normally set to 1.
All the options on page 2 are set with the programmable switch
modules.
These are the discretes that you can see on page 3:
* MODEL/ENGINE. Shows the current status of the engine/
airframe program pins to the FMC. This is set through the
programmable switch modules.
* ENGINE BLEED. Shows the position of the engine bleed air
switches on the P5 overhead panel.
* SEL CONFIG MODE. This option enables the loadable
software configuration. This is set through the
programmable switch modules.
These are the discretes that you can see on page 4:
* VOR INHIBIT - This option disables VOR inputs for the
navigation function.
* FLIGHT NUMBER - This option lets the crew enter the flight
number on the RTE page.
* TOGA RW POS UPD - This option lets the FMC do a position
update when the TOGA switches are pushed on the ground.
FMCS - TRAINING INFORMATION POINT - FMCS BITE PAGES - DISCRETES
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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* TAKEOFF PROFILE - This option gives FMC control of the
altitude at which takeoff thrust is reduced to climb thrust.
* TAKEOFF SPEEDS - This option enables the FMC to
calculate the takeoff speeds based on the QRH and shows
them on the TAKEOFF page.
* NAVAID SUPPRESS - This option suppresses autotuned
navaids on the CDS map display.
* SEL CRS INHIBIT - This option suppresses selected course
radials for manually tuned navaids on the CDS map display.
* ACARS INSTALLED - This option enables the ACARS/FMC
interface.
All the options on page 4 are set with the programmable switch
modules.
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT
ARE CLEAR OF THE SLATS BEFORE YOU
REMOVE ELECTRICAL POWER FROM THE AIR/
GROUND RELAYS. THE SLATS CAN MOVE
AUTOMATICALLY WHEN FLAPS ARE IN
POSITION 1, 2, OR 5, AND THE NOSE OR MAIN
LANDING GEAR AIR/GROUND RELAYS INDICATE
AN AIRBORNE CONDITION. THIS CAN CAUSE
INJURY TO PERSONS OR DAMAGE TO
EQUIPMENT.
FMCS - TRAINING INFORMATION POINT - FMCS BITE PAGES - DISCRETES
EFFECTIVITY
SHZ ALL 34-61-00
Page 98.140
D633A101-SHZ1 Oct 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
34-61-00-060
FMCS - TRAINING INFORMATION POINT - FMCS BITE PAGES - DISCRETES
FMCS - TRAINING INFORMATION POINT - FMCS BITE PAGES - DISCRETES
EFFECTIVITY
SHZ ALL 34-61-00
Page 98.141
D633A101-SHZ1 Oct 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
34-61-00-060
General
To look at the FMCS fixed outputs, select FIXED OUTPUTS on
line select key (LSK) 5L from the FMCS BITE page. The mode
selectors on both EFIS control panels should also be set to the
MAP mode.
FIXED OUTPUTS Page 1/2
This page shows FMCS data that goes to the thrust mode
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