SUBJECT
REF. MDL.
REPORT NO.
INSTRUCTIONS FOR CONTINUED AIRWORTHINESS
GA182
ICA182-2
Rev. A
10/15/12
SEE NON-DISCLOSURE NOTICE ON THE COVER PAGE
93 of 101
Copyright 2012
Eagle Copters
All Rights Reserved
Section 7.0 Audio System Testing
NOTE
Anytime the Router or Control Panel has been replaced complete a full Audio System
Load Analysis, Audio System Functional Check and a Final Inspection as described in
7.1
Audio System Load Analysis
a.
At the completion of the installation of the audio system, the installer
shall perform a load analysis test of the electrical branch circuit (buss)
that powers the audio system, and also the entire aircraft electrical
load, to confirm that the addition of the audio system will not cause an
overload to the electrical branch circuit or the aircraft generator.
b.
The current shall be measured using a properly calibrated clamp on
ammeter, Amprobe Instrument model number ACDC-600A, or
equivalent.
c.
Perform the branch circuit load analysis test by powering up all
equipment that is intended to be operated at the same time on the
branch circuit that the audio system is connected to. Additionally, key
the three highest power communication transmitters at the same time,
if possible, while the current measurements are being taken.
d.
Measure the current of the branch circuit powering the audio system,
by clamping the meter around the branch circuit wire near its origin at
the aircraft master electrical distribution box. Confirm that the current
draw during the above described test conditions is less than the
current limiter (fuse or circuit breaker) rating for that branch circuit.
e.
If the current draw is greater than the current limiter rating, it becomes
the installer's responsibility to re-distribute enough of the other
equipment powered by this branch circuit to another suitable branch
circuit, in order to reduce the load on the audio system's branch circuit
to less than the current limiter rating.
