PS Engineering
PMA8000 Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-890-0000
Appendix E
Revision 9, June 2005
Appendix E- Instructions for FAA
Form 337 and continuing airworthiness
9.1
Instructions for FAA Form 337, Audio Panels
One method of airworthiness approval is through an FAA Form 337,
Major Repair and Alteration (Airframe, Power-
plant, Propeller, or Appliance)
In the case of the PMA8000, you may use the following text as a guide.
Installed audio selector and 6-place intercom, PS Engineering PMA8000, part number 050-890-(X) in (
loca-
tion
) at station . Installed per
AC43.13-2, Chapter 2, paragraph 23
(Instrument Panel Mounting). Installed
per PS Engineering
Installation Operators Manual
p/n 200-890-(XXXX), revision (), dated ( ).
These units are FAA-Approved under TSO C50c for audio amplifiers, and/or TSO C35d for Marker Beacon
Receivers, and meets appropriate environmental qualifications outlined in RTCA DO-160D as appropriate or
this aircraft.
Interface to existing aircraft radios in accordance with installation manual and in compliance with practices
listed in
AC43.13-2
, Chapter 2. All wires are Mil-Spec 22759 or 27500. Connection to aircraft dimmer bus is
____________________. Power is supplied to the unit through a 3A circuit breaker (type and part number),
and total electrical load does not exceed % of the electrical system capacity with the PMA8000 added.
Aircraft equipment list, weights and balance amended. Compass compensation checked. A copy of the opera-
tion instructions, contained in PS Engineering document 200-080-( ), revision ( ), dated ( ), is placed in the air-
craft records. All work accomplished listed on Work Order
.
9.2
Instructions for Continuing Airworthiness, Audio System
Sample ICA Checklist for PS Engineering Audio System:
Section Item
Information
1
Introduction
Installation of audio control panel with integrated marker beacon receiver and
intercommunications system.
2 Description
Installation
as
described in manufacturer’s installation manual referenced on
FAA Form 337, including interface with other avionics audio as required.
3
Controls
See installation and operator’s guide referenced on FAA Form 337.
4 Servicing
None
Required
5
Maintenance Instructions
On Condition, no special instructions
6
Troubleshooting
In the event of a unit problem, place the unit into “off,” “fail-safe” and/or
“emergency” mode. This allows pilot communications using COM 1. Follow
checkout instructions in the installation manual referenced on the FAA Form
337. For a specific unit fault, contact the manufacturer at (865) 988-9800 for
special instructions.
7
Removal and replacement informa-
tion
Removal: Using a 3/32” Allen-head wrench, carefully unscrew the locking
screw located in the center of the unit. While turning the wrench CCW, gently
pull on the EDGES of the bezel until the unit is free from the mounting tray.
Installation: Engage the locking screw at the back. Turn the locking screw CW,
while applying slight pressure to the edges of the bezel. Do not over tighten!
8 Diagrams
Not
applicable
9
Special Inspection Requirements
Not Applicable
10
Protective Treatments
Not Applicable
11
Structural Data
Not Applicable
12 Special
Tools
None
13
Not Applicable
Not Applicable
14
Recommended Overhaul Periods
None
15
Airworthiness Limitations
Not Applicable
16
Revision
To be determined by installer
