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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
22-11-00-016
DFCS - FLIGHT CONTROL COMPUTER DIGITAL INPUT INTERFACE-2
DFCS - FLIGHT CONTROL COMPUTER DIGITAL INPUT INTERFACE-2
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
22-11-00-016
General
These components also send digital data to the FCCs:
* Autothrottle (A/T) computer
* Display electronic units (DEU) 1 and 2
* Left and right air data inertial reference units (ADIRU).
A/T Computer
The A/T computer sends A/T discrete digital data to both FCCs.
The FCCs use this data to determine the mode the A/T is in and
to which modes it will allow a change.
DEU
The DEUs send the engine N1 signal data to the FCCs to
calculate the speed trim fade-out gain and the maximum alpha
angle for go-around. The DEUs also send discrete data to the
FCCs to tell the FCCs which DEU sends data to which display
unit.
ADIRU
Each ADIRU sends these air data reference (ADR) signals to its
onside FCC:
* Uncorrected altitude
* Baro corrected altitude number 1
* Baro corrected altitude number 2
* Mach
* Computed airspeed
* Maximum allowable airspeed (VMO/MMO)
* True airspeed
* Static pressure
* Total pressure
* Indicated angle of attack.
Each ADIRU sends these inertial reference (IR) signals to the
two FCCs:
* Ground speed
* True track angle
* True heading
* Magnetic track angle
* Magnetic heading
* Flight path acceleration
* Pitch angle
* Roll angle
* Body longitudinal acceleration
* Body lateral acceleration
* Pitch attitude rate
* Roll attitude rate
* Inertial altitude
* Vertical acceleration
* Inertial vertical speed.
The FCCs use the ADIRU data to calculate many different
commands. To see what DFCS functions use the ADIRU data,
look at the functional description pages for the autopilot, flight
director, speed trim, mach trim, and altitude alert.
DFCS - FLIGHT CONTROL COMPUTER DIGITAL INPUT INTERFACE-3
EFFECTIVITY
SHZ ALL 22-11-00
Page 44
D633A101-SHZ1 Jun 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
22-11-00-017
DFCS - FLIGHT CONTROL COMPUTER DIGITAL INPUT INTERFACE-3
DFCS - FLIGHT CONTROL COMPUTER DIGITAL INPUT INTERFACE-3
EFFECTIVITY
SHZ ALL 22-11-00
Page 45
D633A101-SHZ1 Jun 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
22-11-00-017
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DFCS - FLIGHT CONTROL COMPUTER DIGITAL INPUT INTERFACE-3
22-11-00
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D633A101-SHZ1 Oct 10/2002
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
General
The FCCs send digital data to these components:
* Mode control Panel (MCP)
* DEUs 1 and 2
* Flight data acquisition unit (FDAU).
Each FCC also sends cross-channel digital data and BITE data
to the other FCC. The cross-channel digital data includes
several items so the two FCCs can compare and synchronize
data. These are some of the items:
* Flight director data
* Dual autopilot synchronization data
* Mode status data.
MCP
Each FCC sends digital data to the MCP. This data includes
these parameters:
* Target mach
* Target airspeed
* Selected course number 1
* Selected course number 2
* Selected heading
* Selected altitude
* Selected airspeed
* Selected vertical speed
* Selected mach
* Flap position
* Flight director roll command
* Flight director pitch command
* Airspeed bug drive
* Spoiler 4 position
* Spoiler 9 position
* Flight path angle rate
* AFDS discrete word 1, 2, 3, and 4
* DFCS BITE response.
The MCP uses the data from the master FCC to display in the
MCP windows and light the MCP mode select pushbuttons. The
MCP also passes the master FCC data to other systems which
shows in the next pageset.
DEU
Each FCC sends digital data to the two DEUs. This data includes
these parameters:
* Selected course number 1
* Selected course number 2
* Selected heading
* Selected altitude
* Flight director roll command
* Flight director pitch command
* Airspeed bug drive
* AFDS discrete word 2 and 4 to give flight mode annunciation
　
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