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transfer relay 1.
Data Output
The bus 02 has this data:
* Distance to go (waypoint)
* Groundspeed
* VOR/DME frequencies
* Set latitude
* Set longitude
* Set magnetic heading
* Origin/destination
* Destination runway
* Destination estimated time of arrival (ETA)
* Gross weight
* Total fuel
* FMC target altitude
* FMC target airspeed
* FMC target mach number
* Horizontal command
* Vertical speed command
* Desired track
* Waypoint bearing
* Cross-track deviation
* Vertical deviation
* Magnetic track angle
* Drift angle
* GMT
* Date
* Static air temperature (SAT)
* Selected temperature
* Flight number
* Minimum airspeed
* Minimum buffet airspeed
* Maximum buffet airspeed
* Continuous N1 limit
* Go-around N1 limit
* Cruise N1 limit
* Climb N1 limit
* Target N1
* NDB effectivity
* BITE test word
* FMC discretes.
The FMC discretes have this data:
* IAS/mach
* Engine out engaged
* Landing flaps selected
* Manual N1 select
* Level decel
* Autothrottle to idle arm
* Autothrottle to arm
* FMC vertical speed
* N1 limit mode
* Speed on elevator
* Reduced thrust (derate)
* Level change request
* VNAV valid
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* Thrust cutback enable
* Initiate thrust cutback.
The bus 05 has FMC system status.
ACARS
The FMC/ACARS interface allows the receipt (uplink) and
transmission (downlink) of FMC data from or to the customers
ground computers via the ACARS management unit.
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FMCS - ACARS INTERFACE
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General
Inputs from switches and valves give engine bleed air data to
the FMCS. The FMCS uses these signals to calculate the N1
limits for the engines.
The program pin selectable options customize the FMCS to the
airline configuration.
The proximity switch electronics unit (PSEU), supplies an air/
ground discrete input to the FMCS to set flight leg count. The
air/ground discrete also goes to the FMC to inhibit data load in
the air.
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FMCS - ANALOG DISCRETES
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General
The autoflight status annunciators (ASAs), have three warning
lights. The warning lights are push to reset. The ASA also has a
TEST switch.
The ASAs show a change of condition for these systems:
* Autopilot
* Autothrottle
* Flight management computer system (FMCS).
FMCS
The FMC warning light is amber when an FMC has an alert
message or when an FMC fails. The light also comes on when
you put the TEST switch in position 1 or 2.
Push the FMC warning light to reset the latch and turn the light
off.
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EFFECTIVITY
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FMCS - STATUS ANNUNCIATOR INTERFACE
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