PS Engineering
PMA450C Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-450-0800
Page 2-1
July 2022
Section II - INSTALLATION
GENERAL INFORMATION
2.1.1
SCOPE
This section provides detailed installation and interconnection instructions for the PS Engineering PMA450C
Audio Selector Panel/Intercom/ with internal Marker Beacon.
Please read this manual carefully before beginning any installation to prevent damage and post-installation
problems.
Installation of this equipment requires special tools, test equipment (refer to §2.12.1) and installer knowledge
as required by 14 CFR 65.81 (b).
2.1.2
Certification Requirements
NOTE
The PMA450C requires specialized knowledge and tools for an effective installation. An appropriately
rated Certified Aircraft Repair Station
must
install this equipment in accordance with applicable regula-
tions. PS Engineering, Incorporated warranty is not valid unless the equipment is installed by an authorized
PS Engineering, Incorporated dealer.
Failure to follow any of the installation instructions, or installation by a non-certified individual or agency
will void the warranty, and may result in an
unairworthy
installation.
This article meets the minimum performance and quality control standards required by a technical standard
order (TSO). Installation of this article requires separate approval. Refer to AC 20-41A for information
regarding Substitute TSO Aircraft Equipment.
Unpacking and Preliminary Inspection
Use care when unpacking the equipment. Inspect the units and parts supplied for visible signs of shipping
damage. Examine the unit for loose or broken buttons, bent knobs, etc. Verify the correct quantity of com-
ponents supplied with the list in §1.6. If any claim is to be made, save the shipping material and contact the
freight carrier. Do NOT return units damaged in shipping to PS Engineering. If the unit or accessories show
any sign of external shipping damage, contact PS Engineering to arrange for a replacement. Under no cir-
cumstances attempt to install a damaged unit in an aircraft. Equipment returned to PS Engineering for any
other reason should be shipped in the original PS Engineering packaging, or other UPS approved packaging.
Equipment Installation Procedures
2.3.1
Cooling Requirements
Forced air-cooling of the PMA450C is not required. However, the units should be kept away from heat pro-
ducing sources (i.e. defrost or heater ducts, dropping resistors, heat producing avionics) without adequate
cooling air provided.
2.3.2
Mounting Requirements
The PMA450C must be rigidly mounted to the instrument panel of the aircraft structure, within view and
reach of the pilot position(s). Installation must comply with FAA Advisory Circular AC 43.13-2B, or other
FAA-approved aircraft technical data. The unit may be mounted in any area where adequate clearance for
the unit and associated wiring bundle exist.
To prevent noise, avoid installing the unit close to high current devices or systems with high-voltage pulse
type outputs, such as DME or transponders. Avoid running the interconnecting bundles near any high current
wires.
