Embraer EMB145, Operation Manual

Page: 2193 / 2662

AIRPLANE
OPERATIONS
MANUAL
FLIGHT
INSTRUMENTS
REVISION 28
2-17-10
Page
1
Code
01
AIR DATA SYSTEM (ADS)
The Air Data Systems are designed for sensing, processing, and
transmitting air data information to various systems and instruments of
the airplane.
The ADS 1 (LH) consists of one Air Data Computer (ADC), one Pitot
Tube, one Total Air Temperature Probe (TAT) and two Static Ports.
The ADS 2 (RH) consists of one Air Data Computer (ADC), one Pitot
Tube, one Total Air Temperature Probe (TAT) and two Static Ports.
The Standby System consists of one Pitot/Static Tube, one Standby
Altimeter and one Standby Airpeed Indicator.
The Pitot and Pitot/Static tubes, TAT probes and Static Ports are
heated for anti-icing purposes. For further information about the anti-
icing system, refer to Section 2-15, Ice and Rain Protection.
The ADSs 1 and 2 interface with the airplane’s systems through the
ADCs, as follows:
−
IC-600 - Both ADCs supply pressure altitude, barometrically
corrected altitude, true airspeed, calibrated airspeed, vertical
speed, Mach number, static air temperature, V
MO
and total air
temperature to both IC-600.
−
FADEC - The ADC 1 supplies the FADEC 1A and 2A, and the
ADC 2 supplies the FADEC 1B and 2B with total pressure, Mach
number, and total air temperature.
−
HSCU - The ADCs provide calibrated airspeed for the HSCUs.
−
TRANSPONDER - Both ADCs provide pressure altitude
information for both transponders/TCAS.
−
AHRS (AH-900 only) - The ADC 1 supplies AHRS 1 and ADC 2
supplies AHRS 2 with true airspeed.
−
FMS - The ADC 1 provides true airspeed for the FMS.
−
WEATHER RADAR - The ADC 2 provides altitude data for the
weather radar.
−
SPS - Both ADCs provide Mach number information for the Stall
Protection System.
−
GPWS - The ADC 1 provides airspeed (CAS and TAS), altitude,
and vertical speed information for the GPWS.