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SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
this orientation, the principal axes of the AMT-3500 IGA should be aligned with
those of the aircraft to within ± 0.25°. This is the default position for the
AMT-3500 IGA.
You can install the AMT-3500 IGA in a position that is slightly offset from the
default position.
offsets, the procedure for configuring the HDU is provided in the System
Setup Section 1F, this is the preferred method for applying any antenna
installation offsets. Optionally
an offset to correct beam steering. During the initial installation, set the pitch,
roll, and rotation offset angles to within ± 0.25° in the AMT-3500 IGA
EEPROM—MN-1242-20010 provides information about setting up the
AMT-3500 IGA.
(4) Installing the Antenna Interface Adapter
The installer must follow proper avionics procedures both when sealing the
mounting adapter to the fuselage and when sealing the AMT-3500 IGA to the
mounting adapter to avoid trapping water and corrosion. Use approved avionics
sealants and corrosion inhibitors.
The AMT-3500 IGA has two weeping/venting locations on the underside of the
unit. These venting locations are sealed, and no special precautions are
required to seal the antenna. The base of the antenna (except the grounding
areas) is painted.
(5) Installing the AMT-3500 IGA
Honeywell recommends using #10 stainless steel (CRES) fasteners with
minimum UTS of 80 KSI for mounting hardware. Torque for #10 screws is
typically 20-22 in-lbs.
To install the antenna assembly:
1. Remove the aft cover fasteners from the antenna assembly.
2. Carefully position and secure the antenna assembly on the mount, taking
care not to damage exposed cabling.
3. Connect the test harness (incorporating RS-422 maintenance lines) to the
IGA-J1.
4. Perform a software alignment using the AMT-3500 IGA MPU (optional if
installed in default orientation). Remove the test harness when the test is
complete.
5. Connect all cables to the antenna assembly.
6. Install the aft cover with #6 screws, 1242-K-0105-56 (SCREW PFH.138-32
X 9/16L CRES), and 16–18 in-lbs of torque as shown below.
NOTE: The screws shown below are longer than the standard mounting
NOTE: Do not torque the aftmost bolt over the recommended 20–21 in-lbs.
© Honeywell International Inc. Do not copy without express permission of Honeywell.
Aspire-200
The HDU can be configured to compensate for installation
, software in the AMT-3500 can accommodate
screws.
23-15-45
Page 4-12
28 Feb 2018
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