User's Manual Part 1

T
2
CAS / Part No. 9000000
SYSTEM DESCRIPTION AND INSTALLATION MANUAL
34-43-20
15 Feb 2003
Use or disclosure of information on this page is subject to the restrictions in the proprietary notice of this document.
2--1
MECHANICAL INSTALLATION
1. General
This section contains information on how and where to mount each component of the T
2
CAS
system. For new installations, plan installation in two stages. First, determine the location of
the LRUs in the aircraft. Next, determine the length of RF and electrical interconnections for
selected locations.
NOTE: The RT--95X CFDS/CMC capability has not been demonstrated as part of an
installed system. The CFDS/CMC capab ility must be demonstrated on the aircraft to
the appropriate certification authorities before the CFDS/CMC functionality may be
used.
2. Equipment and Materials
For new T
2
CAS installations, refer to Table 1-- 1 for RCZ-- 852 Transponder Installation Kit
information and Table 1-- 2 for mounting tray information. For all other components, refer to
the applicable Outline and Installation drawing in this section for mounting information. The
Outline and Installation drawings show connector and connector contact pin/socket part
number information, where applicable.
3. Mechanical Installation Design
NOTE: To assure proper grounding of the T
2
CAS system, the aircraft surface t o which all
mountings or units are attached must be clean bare metal. Mount to the airframe
with a resistance of 5 milliohms or less.
A. TT--950/951/952 T
2
CAS Computer Unit Provisions
Mechanical installation data for the TT -- 950/952 T
2
CAS Computer Unit (6--MCU) is
shown in Figure 2--6. Data for the TT-- 951 T
2
CAS Computer Unit (4--MCU) is shown in
Figure 2-- 7.
The computer unit can be mounted in any convenient location in the aircraft; however, it
must be located so as to maintain an antenna coaxial cable insertion loss of 2.5 ± 0.5 dB
in accordance with DO-- 185. This is approximately within 50 feet of the antenna unless
low loss coaxial cable is used. Top and bottom coaxial delay timing differences can be
compensated for by use of the antenna delay program pins.