Northern Airborne Technology AA21-4xx - Manual (Page 19)

SM34 Rev. 4.00 AA21-400 Cabin PA System Manual
Nov 10, 2003 Page 2-1
ENG-FORM: 800-0106.DOT
Amendment #1 Jan 18, 2005
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
Section 2.0 Installation
2.1 Introduction
Information in this section consists of: unpacking and inspection procedures, installation
procedures, post-installation checks, and installation drawings.
2.2 Unpacking and Inspection
Unpack the equipment carefully and locate the warranty card. Inspect the unit visually
for damage due to shipping and report all such claims immediately to the carrier
involved. Note that each unit should have the following:
- AA21-400 Cabin PA System
- Warranty Card
- Operator’s Manual
- Release certification
Verify that all items are present before proceeding and report any shortage immediately
to your supplier.
Complete the warranty card information and send it to NAT when the installation is
complete. If you fail to complete the warranty card, the warranty will be activated on
date of shipment from NAT.
2.3 Installation Procedures
2.3.1 Note to Installers
The AA21-400 is intended for use as a cockpit-mounted control for an internal or
external aircraft PA system, where such a system is not installed to fulfill the
airworthiness requirements for the aircraft or an operating rule.
The AA21-400 is certified to RTCA DO-160D Section 20 (RF Susceptibility) Category T,
for installation in a well-protected electromagnetic environment such as an enclosed
avionics bay in an all-metallic aircraft. The equipment shall therefore not be installed to
satisfy the requirement of FAR 25.1423 for a Public Address system.
2.3.2 Warnings
Never ground any audio output line from the AA21-400 or permanent damage may result.
Always check ADF and compass calibration after installing external speakers or PA
amplifiers. Significant single cycle errors may be caused by the concentration of steel and
magnetic material. Do not bundle any lines from these units with transmitter coax lines.
Do not bundle any lines from this unit with 400 Hz synchro wiring, or AC power lines.