400 SERIES INSTALLATION MANUAL Page 1-1
P/N 190-00140-02 Page Rev L
1. GENERAL DESCRIPTION
1.1 INTRODUCTION
This manual describes the physical, mechanical, and electrical characteristics and the installation
requirements for the 400 Series (GPS 400, GNC 420, and GNS 430) Panel-mounted units. After
installation of the 400 Series system, FAA Form 337 must be completed by an appropriately certificated
agency to return the aircraft to service.
1.2 EQUIPMENT DESCRIPTION
The 400 Series units are mark width (6.25” wide) units, and 2.66” high. The display is a 128 by 240 pixel
color LCD. The units include two removable data cards, one with a Jeppesen database, and the second
being an optional custom data card.
The GPS 400 is a GPS receiver certifiable for IFR en route, terminal, and non-precision approach
operations.
The GNC 420/ (A) includes all the features of the GPS 400, and also includes an IFR certified airborne
VHF communications transceiver. The (A) model is a 28 Vdc unit with a 16 Watt COM transmitter.
The GNS 430/ (A) includes all the features of the GNC 420, and also includes IFR certified airborne
VOR/Localizer and Glideslope receivers. The (A) model is a 28 Vdc unit with a 16 Watt COM transmitter.
GPS signals are received by Garmin's low profile GA 56 antenna (P/N 010-10040-0X).
CAUTION
The 400 Series product lens is coated with a special anti-reflective coating which is very
sensitive to skin oils, waxes and abrasive cleaners. It is very important to clean the lens
using an eyeglass lens cleaner which is specified as safe for anti-reflective coatings (one
suitable product is Wal-Mart
®
Lens Cleaner) and a clean, lint-free cloth.
CAUTION
The use of cellular telephones while aircraft are airborne is prohibited by FCC rules. Due
to potential interference with onboard systems, the use of cell phones while the aircraft is
on the ground is subject to FAA regulations (Part 91.21).
FCC regulation 47 CFR Ch.1 (Section 22.925) prohibits airborne operation of cellular
telephones installed in or carried aboard aircraft. Cellular telephones must not be operated
while aircraft are off the ground. When any aircraft leaves the ground, all cellular
telephones on board that aircraft must be turned off.
Cell phones that are on, even in a monitoring state, can disrupt GPS performance.
