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Vol. 1 12--30--2
FLIGHT INSTRUMENTS
Air Data System
Flight Crew Operating Manual MASTER
CSP A--013
Pitot Static System --- General
Figure 12---30---1
RIGHT PITOT--STATIC PROBE
LEFT PITOT--STATIC PROBE
ALTERNATE PITOT TUBE
TOTAL AIR TEMPERATURE PROBE
ALTERNATE STATIC PORT
ALTERNATE STATIC PORT
Vol. 1 12--30--3
REV 56, Jan 31/03
FLIGHT INSTRUMENTS
Air Data System
Flight Crew Operating Manual
CSP A--013
MASTER
B. Air Data
The air data system provides computed air data (speed, altitude and temperature)
information to the following systems:
S Integrated avionics preocessor system (IAPS)
S Attitude and heading reference system (AHRS)
S Inertial reference system (IRS) <0025>
S Stall protection computer and flap ECU
S Air traffic control transponders and TCAS
S Flight control computers and flight director
S Electronic flight instrument system (EFIS) and engine indication and crew alerting
system (EICAS) displays.
The air data system provides the following air data parameters:
S Pressure altitude and barometric--corrected altitude
S Vertical speed, indicated airspeed, Mach number and true airspeed (TAS)
S IAS reference (automatically through the AP control or manually through the air data
reference panel)
S Static air temperature (SAT)
S Calibrated and indicated airspeed (CAS / IAS)
S Overspeed warning (present airspeed and Vmo)
S Total air temperature (TAT)
S Temperature variations from international standard atmosphere (ISA).
In addition to the above parameters, the air data system computes and controls the
following reference values and parameters:
S Preselect altitude
S Airspeed trend vector
S Maximum allowable speed (VMO)
S Maximum allowable Mach (MMO)
S Vertical speed references.
REV 56, Jan 31/03
Vol. 1 12--30--4
FLIGHT INSTRUMENTS
Air Data System
Flight Crew Operating Manual MASTER
CSP A--013
C. Air Data Reference Panels
The air data reference panels (ARP) are located on the pilot’s and copilot’s side panels.
Each ARP is used to enable selection of airspeed reference pointers and barometric
correction for altitude.
Each ARP functions with the same-side ADC, display control panel, primary flight
display and multifunctional display. The ARP is divided into three sections:
S The speed references section is used to select and input changes to the various
target and speed settings (V1, VR, V2 and VT). Both PFDs will display the same
values.
S The altitude references section is used to set minimum descent altitude (MDA) and
decision height (DH) values and to initiate radio altimeter self test.
S The barometric references section is used to select and input changes to the ADC
barometric pressure, to select indicating units (hPa or inHg) and to set standard
barometric pressure. Each PFD can have a different barometric pressure setting.
The last value selected is retained in the ADC memory for the next power up.
Vol. 1 12--30--5
REV 56, Jan 31/03
FLIGHT INSTRUMENTS
Air Data System
Flight Crew Operating Manual
CSP A--013
MASTER
Air Data System <MST>
Figure 12---30---2
HEAD--UP
GUIDANCE
SYSTEM
INTEGRATED
AVIONICS
PROCESSOR
SYSTEM AIR DATA
COMPUTER
2 TOTAL
AIR
TEMPERATURE
PITOT
STATIC
AIR TRAFFIC
CONTROL
TRANSPONDER
1
AIR TRAFFIC
CONTROL
TRANSPONDER
2
AIR DATA
COMPUTER
TOTAL 1
AIR
TEMPERATURE
ATTITUDE
AND HEADING
AHRS 1 / IRS 1
PITOT
STATIC
COPILOT’S AIR DATA
FLIGHT CONTROL PANEL REFERENCE PANEL
PILOT’S AIR DATA
REFERENCE PANEL
ATTITUDE/
ACCELERATION
ATTITUDE/
ACCELERATION
ATTITUDE
AND HEADING
AHRS 2 / IRS 2
<0025> <0025>
<0026>
ALTITUDE;
MACH/AIRSPEED;
VERTICAL SPEED
(AHRS ONLY).
PFD 1 MFD 1 MFD 2 PFD 2
REV 56, Jan 31/03
Vol. 1 12--30--6
FLIGHT INSTRUMENTS
Air Data System
Flight Crew Operating Manual MASTER
CSP A--013
Pitot Static System
Figure 12---30---3
Mach Transducer 1 (Pilot’s Side)
Pilot’s Mach Transducer
Source Selector /
Isolation Valve
Mach Transducer 2 (Copilot’s Side)
Copilot’s Mach Transducer
Source Selector /
Isolation Valve
(Mach data to SPS Channel 1) (Mach Data to SPS Channel 2)
SELECTOR
VALVE CLOSED
MACH
TRANSDUCER
PITOT
　
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