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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
34-61-00-021
Purpose
You use the airborne data loader (ADL) to load data into
selected LRUs and to record data from selected LRUs. You use
the data loader control panel to select the LRU.
Physical Description/Features
The airborne data loader (ADL) is an ARINC-615 high speed
loader. These are the ADL features:
* Access door
* Disk drive
* Disk drive light
* Disk drive eject button
* Display.
These messages show on the display:
* PROG (Data transfer in progress)
* CHNG (Diskette change required)
* COMP (Data transfer complete)
* RDY (The loader is ready for operation. If RDY flashes, the
LRU has stopped the data transfer to check the data. The
transfer will continue automatically)
* XFER (Data transfer failure)
* R/W (Unable to access diskette data)
* HRDW (Internal loader failure. If HRDW flashes, there is no
communication between the loader and the LRU).
The data loader does an internal self test at power up. During
the self test, all the front panel status indicators flash. At the end
of the self test, the indicators go off. If there is a failure at power
up, the message HRDW shows on the display. If the self test is
satisfactory, the message RDY shows. The other indicators
come on as the data loader moves through the load or transfer.
FMCS - AIRBORNE DATA LOADER
EFFECTIVITY
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FMCS - AIRBORNE DATA LOADER
FMCS - AIRBORNE DATA LOADER
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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Purpose
There are two FMCS transfer relays. Output data from the FMC
goes through the relays. The relays are mechanically latched to
the BOTH ON L position.
Location
The relays are on the E5-2 shelf in the electronic equipment
compartment.
Physical Description
The relays are Ledex type relays. They mechanically latch and
are hermetically sealed.
FMCS - TRANSFER RELAYS
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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FMCS - TRANSFER RELAYS
FMCS - TRANSFER RELAYS
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
34-61-00-023
General
These are the primary FMC functions:
* Navigation
* Performance
* Guidance.
The FMC does the primary functions with data input from these
sources:
* Flight crew
* Airplane system sensors
* Data stored in the FMC memory.
This is the data in memory:
* Operational flight program (OFP)
* Navigation data base (NDB)
* Performance default data base (PDDB)
* Airplane model/engine performance data base (MEDB)
* ACARS adaptable datalink data base (AADD)
* Software options data base.
NOTE: Operational flight program (OFP) is also referred to as
operational program software (OPS).
FMC Data Bases
The operational flight program is the computer software that the
FMCS uses to do the navigation, performance, and guidance
functions.
The navigation data base contains all the data necessary for the
airplane operation over a defined route network. This type of
information is available:
* Waypoints
* Navaids
* Airport data
* Airway data
* Standard instrument departures (SIDs)
* Standard terminal arrival routes (STARs).
There are two navigation data bases, the current and a set of
update revisions, stored in the FMC.
The performance default data base is part of the operational
flight program. It has an aerodynamic model of the 737-300/400/
500 series airplanes and a fuel flow/N1 thrust model for the
specific engine on the airplane. This data is used to predict the
performance characteristics that give the optimum vertical
profile for the airplane.
The performance default data base (PDDB) for the 737-600/700/
800 series airplanes is customizable by the airline through the
FMCS OEM and is not part of the operational flight program.
The PDDB is loadable through the data base loader. Default
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