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and groundspeed data for the airshow display.
FMCS
The ADIRU sends this IR data to the flight management
computer system (FMCS):
* Present position
* Groundspeed
* True heading
* Magnetic heading
* Pitch angle
* Roll angle
* Inertial altitude
* Inertial vertical speed
* N-S velocity
* E-W velocity.
The FMCS uses this data for performance and navigation
calculations.
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EFFECTIVITY
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ADIRS - LEFT INERTIAL REFERENCE DIGITAL OUTPUTS
ADIRS - LEFT INERTIAL REFERENCE DIGITAL OUTPUTS
EFFECTIVITY
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General
The right ADIRU supplies inertial reference (IR) data to many
systems and components. IR data goes out on ARINC 429 data
buses. The data on each bus is the same. One data bus goes
from the IR part of the ADIRU to the air data reference (ADR)
part. These are the components and systems that receive IR
data from the right ADIRU:
* Display electronics unit (DEU) 1 and 2
* Radio magnetic indicator (RMI)
* Multi-mode receiver (MMR)1 and 2
* Stall management yaw damper (SMYD) 1 and 2
* Flight control computer (FCC) A and B
* Weather radar receiver transmitter (WXR R/T)
* Integrated flight systems accessory unit (IFSAU)
* Inertial system display unit (ISDU)
* Antiskid autobrake control unit (AACU)
* Autothrottle (A/T) computer
* Flight management computer (FMC) 1.
DEU
The DEUs use this IR data from the ADIRU to show information
on the display units:
* Present position
* Track angle
* Magnetic heading
* Wind direction
* True heading
* Ground speed
* Drift angle
* Flight path angle
* Flight path acceleration
* Pitch angle
* Roll angle
* Body pitch rate
* Body roll rate
* Body yaw rate
* Body longitudinal acceleration
* Body lateral acceleration
* Body normal acceleration
* Track angle rate
* Pitch attitude rate
* Roll attitude rate
* Inertial altitude
* Along track horizontal acceleration
* Cross track horizontal acceleration
* Vertical acceleration
* Inertial vertical speed
* N-S velocity
* E-W velocity.
RMI
The RMI uses magnetic heading data to position its compass
card.
MMR
The MMRs use present position and inertial altitude for GPS
calculations.
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EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
34-21-00-011
SMYDs
SMYD 1 uses this IR data to calculate yaw damper values:
* Roll angle
* Body roll rate
* Body yaw rate
* Body lateral acceleration.
SMYD 2 uses this IR data to calculate stall management and
yaw damper values:
* Pitch angle
* Roll angle
* Body roll rate
* Body yaw rate
* Body longitudinal acceleration
* Body lateral acceleration
* Body normal acceleration
* Inertial vertical speed.
DFCS
The flight control computers (FCC) use this IR data for autoflight
calculations:
* Ground speed
* True track angle
* True heading
* Wind speed
* True wind direction
* Magnetic track angle
* Flight path angle
* Flight path acceleration
* Pitch angle
* Body yaw rate
* Body longitudinal acceleration
* Body lateral acceleration
* Body normal acceleration
* Track angle rate
* Pitch attitude rate
* Roll attitude rate
* Inertial altitude
* Along track horizontal acceleration
* Cross track horizontal acceleration
* Vertical acceleration
* Inertial vertical speed.
WXR R/T
The ADIRU sends this IR data to the WXR R/T:
* Groundspeed
* True heading
* Magnetic heading
* Drift angle
* Pitch angle
* Roll angle.
The WXR R/T uses this data for weather condition calculations
and antenna stabilization.
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