VAL Avionics INS 422 Manual del operador descargar pdf (Pagina 8)

VAL AVIONICS LTD

INS 429 INTEGRATED NAVIGATION SYSTEM

INSTALLATION AND OPERATOR’S MANUAL

Original Issue Page 8 of 21

2.3.3 Wire Harness Fabrication

Val Avionics Ltd. recommends that a factory fabricated wire harness (VPN 0751030) be used for the

installation of the INS 429 Integrated Navigation System. Use of the factory fabricated wire harness will

ensure proper operation of the INS 429, reduction in the occurrence of interfering signals and ground loops,

greatly reduced installation time, and provide prolonged trouble-free performance of your new equipment.

Contact Val Avionics Ltd. or your local avionics distribution center for INS 429 Wire Harness ordering

information.

Although strongly recommended, it is not required to use the factory fabricated wire harness when

installing the INS 429. A wiring harness can be fabricated in the field. Refer to appendix B of this manual

for a complete wiring diagram. The INS 429 is connected to the aircrafts avionics bus via a 3 AMP circuit

breaker. All wires must be 22 AWG MIL-SPEC, unless otherwise noted in accordance with current

regulations. Two and three conductor shielded MIL-C-27500 or equivalent wire must be used where

indicated. Use AMP Contact Crimping Tool (AMP P/N 601966-1) with Positioning Tool (AMP P/N

601699-5) or equivalent to ensure good quality contacts. Refer to FAA Advisory Circular AC 43.13-2A for

acceptable practices and techniques.

2.3.4 INS 429 Installation

2.3.4.1 Mounting

The INS 429 is rigidly mounted in a standard 3.125” round cutout on the aircraft panel. Once a location

has been selected, a visual inspection should be made of the area directly behind the panel which, will be

occupied by the INS 429 and harness assembly for obvious obstructions such as heater ducts, control

cables, fuel and oil lines or any other obstruction. Pay particular attention to the control yoke assembly. It

should be moved to the full limit of travel and verified that sufficient clearance exists prior to beginning

installation. Most aircraft instrument panels will already have existing instrument mounting cutouts. If the

location you have selected requires that a mounting hold be cut, refer to Figure 4: Panel Cut Out on Page

16 for the mounting template. Mark and cut the mounting holes as required.

Position the unit in its upright position, and from the rear of the panel, place the unit into the selected

3.125” panel cutout. With the unit held in place, insert four of the supplied 6-32 X 3/8” screws from the

front and tighten as appropriate. The installing agency must fabricate and attach rear support brackets to

the aircraft structure behind instrument panel as appropriate to support the rear of the INS 429. Then,

attach these brackets to the provided attachment points on the rear of the unit with the supplied 6-32 3/8"

Screws.

2.3.4.2 Antennas

Two antennas are required for the INS 429 installation. A standard VOR/Glide Slope antenna can be used

with the unit such as a COMANT CI-157 or equivalent. The most common location for the antenna is on

top of the vertical stabilizer. The VOR/Glide Slope antenna can be coupled to the unit’s NAV and G/S

antenna ports via an antenna coupler such as a COMANT CI-205 or equivalent coupler. The recommended

marker antenna is a COMANT CI-201 or equivalent mounted on the bottom of the aircraft and coupled to

the MKR antenna port of the unit.

August 2008

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VAL Avionics INS 422 Manual del operador Pagina 8

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