Boeing 737-800 - Display System Information Sources; Air Data Inertial Reference System (ADIRS)

737 Flight Crew Operations Manual
Flight Instruments, Displays -
PFD/ND – System Description
Boeing Proprietary. Copyright © Boeing. May be subject to export restrictions under EAR. See title page for details.
10.21.12 D6-27370-866-EGP
Display System Information Sources
Air Data Inertial Reference System (ADIRS)
The ADIRS produces flight data such as position, speed, altitude and attitude for
the flight displays, flight management computers, flight controls, engine controls
and all other systems requiring inertial and air data.
The major components of the ADIRS are:
Air Data Inertial Reference Unit (ADIRU)
The ADIRUs provide inertial position and track data to the FMC as well as
attitude, altitude and airspeed data to the displays. The ADIRUs process
information measured by internal gyros and accelerometers, and from air data
module inputs, the alpha vanes and other systems.
The ADIRUs are described in Chapter 11, Flight Management, Navigation.
• two air data inertial reference
units (ADIRUs)
• four air data modules
(ADMs)
• one inertial system display
unit (ISDU)
• one dual mode select unit
(MSU)
•six static ports
• three pitot probes
• two alpha vanes
• one total air temperature
probe
F/O PITOT PROBE
PITOT PROBE
CAPT PITOT PROBE
AUXILIARY
ADM
TO
STBY
ADIRU-R
ADIRU-L
CAPT
STATIC
PORT
F/O
STATIC
PORT
ALT
STATIC
PORT
ALT/
AIRSPD
ALPHA
VANE
TAT
PROBE
TO STBY
AIRSPD
PITOT LINES
STATIC LINES
ADM
ADM
ADM
CAPT
STATIC
PORT
F/O
STATIC
PORT
ALT
STATIC
PORT
ALPHA
VANE
September 28, 2006