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– – – –
THURO
/2600
AGLIN
FANOL
TEFLY
FF25
/2600A
774A
/2500A
/2500A
TOC
ONE
RW25
FLIGHT INSTRUMENTS
For Training Purposes Only
May 03
11-43
P I LOT T R A I N I N G GU I D E
TCAS Format
The TCAS format provides a dynamic map with a complete 360-degree circular
representation which is dedicated to TCAS information. Weather radar information
can be overlaid on this page.
For further details on TCAS see Chapter 17 Navigation Systems.
MFD TCAS Format
Figure 11-24
P604_11_043
USTB T+10.7
0 0
SAT 15C
10
LX/WX TAS 5.0
UTC04:30 GS TAT 15C
FMS2
YUL
-10 -04
FLIGHT INSTRUMENTS
11-44 For Training Purposes Only
May 03
P I LOT T R A I N I N G GU I D E
Radio Altimeter
Description
The radio altimeter measures direct radio height (distance above terrain) for use by the
Flight Control Computers (FCCs) and for display on the PFDs.
Components and Operation
The radio altimeter (RA) system consists of the following components:
• one Receiver/Transmitter
• one Radio Altitude Converter
• one Transmit Antenna
• one Receive Antenna
• Associated Components:
• two Air Data Reference Panels (ADRPs)
• two PFD Indicators
In order to conform to JAA CAT II certification requirements,
service bulletin 604-34-005 indicates that the installation of a
second RA is required.
Receiver/Transmitter
The receiver/transmitter transmits, receives and processes RF signals to provide a
display of radio altitude and decision height information on the pilot’s and copilot’s
PFDs. The receiver/transmitter performs this function by measuring the difference in
frequency between the transmitted and received signals. Internal monitoring and selftest
capabilities are also provided.
Antennae
The system uses two identical, linearly polarized antennae, flush-mounted on the
underside of the airplane along the centerline. The forward antenna is used to transmit
and the aft antenna to receive.
NOTE
FLIGHT INSTRUMENTS
For Training Purposes Only
May 03
11-45
P I LOT T R A I N I N G GU I D E
Radio Altitude Display
The radio altitude of the aircraft is displayed both in digital and analog format on the
PFD.
This numeric display appears at the bottom of the attitude indicator as the airplane
descends through 2500 feet above ground level (AGL) and disappears as the airplane
climbs through 2500 feet AGL.
Analog Radio Altitude Scale
A small window appears at the center of the scale as the airplane descends through
1250 feet AGL. This window marks the current radio altitude. This value is
numerically repeated in the bottom portion of the attitude indicator.
An analog radio altitude scale appears as the airplane descends through 1100 feet
AGL. This analog scale is used in conjunction with the ground bar (rising runway) to
assist in visualization of the aircraft’s height above terrain. The scale contains line
marks and single-digit numeric labels. Each digit indicates 100 feet of radio altitude.
At Decision Height (DH), the numeric label and scale change
from green to yellow.
Ground Bar (Rising Runway)
A ground bar displays on the analog radio altitude scale to represent the terrain. As the
airplane descends through 200 feet AGL, the ground bar rises on the analog scale. At 0
feet radio altitude, the top of the ground bar aligns with the center of the scale.
NOTE
FLIGHT INSTRUMENTS
11-46 For Training Purposes Only
May 03
P I LOT T R A I N I N G GU I D E
Radar Altimeter Display
Figure 11-25
P604_11_025
3000’
2500’
1200’
1100’
200’
0’
0
2
1
20
10
10
20
30
0FT
0
4
3
2
1
20
10
10
20
30
200FT
20
10
10
20
1
30
1100FT
20
10
10
20
1
29
1200FT
20
10
10
20
1
30
2500FT
10
10
20
30
1
Note: Not to Scale
FLIGHT INSTRUMENTS
For Training Purposes Only
May 03
11-47
P I LOT T R A I N I N G GU I D E
Standby Instruments
The standby instruments include an airspeed indicator, altimeter, attitude indicator and
compass.
Standby Instruments Locator
Figure 11-26
Standby Airspeed Indicator
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