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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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GPS - MMR BITE
GPS - MMR BITE
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
General
The flight crew uses the flight management computer system
(FMCS) to enter route and vertical performance flight plan data
for a flight.
With ACARS, the FMC can receive flight plan data from a
ground station and can send flight status information to a
ground station.
With the flight plan and inputs from the airplane sensors, the
FMCS does these functions:
* Navigation
* Performance
* Guidance.
Navigation
A navigation data base is in the FMC memory. It includes the
navigation data for the area of operation. The pilot can use the
navigation data base to set the entire flight plan before a flight.
The FMC calculates the airplane position during the flight. To do
the calculation, it uses the inertial reference function and the
radio navigation aids, if available.
The FMC can also use the global positioning system (GPS) to
calculate the airplane position.
The FMC compares the calculated position with the flight plan
for LNAV control. The FMC shows the calculated position and
the flight plan on the navigation display.
Performance
A performance data base in the FMC contains data to model the
airplane and the engines. The flight crew puts this data in the
FMC:
* Airplane gross weight
* Cruise altitude
* Cost index.
The FMC uses the data to calculate these functions:
* Economy speeds
* Best flight altitude
* Top of descent point.
The common display system (CDS) shows target speeds and
altitudes.
Guidance
The FMC sends commands to the digital flight control system
(DFCS) and the autothrottle (A/T). The DFCS and the A/T use
these signals to control the airplane in the lateral (LNAV) and
vertical (VNAV) modes of flight.
FLIGHT MANAGEMENT COMPUTER SYSTEM - INTRODUCTION
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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Built-In Test equipment
You use the FMCS CDU to select and control BITE for these
systems:
* FMCS
* Digital flight control system (DFCS)
* Autothrottle (A/T)
* Air data inertial reference unit (ADIRU)
* Common display system (CDS)
* Electronic engine controller (EEC)
* APU engine control unit (ECU)
* Fuel quantity indication system (FQIS).
Abbreviations and Acronyms
* AA - autoflight status annunciator
* AADD - ACARS adaptable datalink database
* act - active
* AC - alternating current
* ACARS - aircraft communications addressing and reporting
system
* ACMS - airplane conditioning monitoring system
* ADIRU - air data inertial reference unit
* ADIRS - air data inertial reference system
* ADL - airborne data loader
* alt - altitude
* appr - approach
* APU - auxiliary power unit
* ARINC - aeronautical radio incorporated
* arr - arrival
* ASA - autoflight status annunciator
* ASIC - application specific integrated circuit
* A/S - airspeed
* A/T - autothrottle
* ATA - actual time of arrival
* ATC - air traffic control
* BIT - built in test
* BITE - built in test equipment
* brg - bearing
* C - celsius
* calc - calculate
* CAS - computed airspeed
* CAPT - captain
* CDS - common display system
* CDU - control display unit
* clb - climb
* clr - clear
* CO - company
* CON - continuous
* cmd - command
* chng - change
* comp - complete
* crs - course
* crz - cruise
* ctr - center
* DC - direct current
* del - delete
* dep - departure
* des - descent
* dest - destination
* DEU - display electronic unit
* dev - deviation
* DFDAU - digital flight data acquisition unit
* DFCS - digital flight control system
FLIGHT MANAGEMENT COMPUTER SYSTEM - INTRODUCTION
EFFECTIVITY
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