PS Engineering
PAC45A Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-045-0100
Appendix F
Rev. 9, July 2019
Appendix F – Instructions for FAA Form 337 and continuing airworthi-
ness
10.1 Instructions for FAA Form 337, Audio controllers
One method of airworthiness approval is through an FAA Form 337,
Major Repair and Alteration (Airframe, Powerplant, Propel-
ler, or Appliance)
In the case of the PAC45D, you may use the following text as a guide.
Installed audio selector and 6-place intercom, PS Engineering PAC45D, part number 050-045-(XXXX) in (
location
) at
station
. Installed per
AC43.13-2, Chapter 2, paragraph 23
(Instrument Panel Mounting). Installed per PS Engi-
neering
Installation Operators Manual
p/n 200-045-(XXXX), revision (), dated ( ).
These units are FAA-Approved under TSO C139A for audio amplifiers, and meets environmental qualifications outlined
in RTCA DO-160G 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 #A circuit breaker (type and part number), and total
electrical load does not exceed % of the electrical system capacity with the PAC45D added.
Aircraft equipment list, weights and balance amended. Compass compensation checked. A copy of the operation in-
structions, contained in PS Engineering document 202-045-( ), revision ( ), dated ( ), is placed in the aircraft records. All
work accomplished listed on Work Order
.
10.2 Instructions for Continuing Airworthiness, Audio System
Sample ICA Checklist for PS Engineering PAC45D Audio System:
Section
Item
Information
1
Introduction
Installation of audio control panel with intercommunications system, with inte-
grated audio alert system.
2
Description
Installation as described in manufacturer’s installation manual referenced on
installation documentation (FAA Form 337, etc.), including interface with other
avionics audio as required.
3
Controls
See installation and operator’s guide referenc
ed on installation documenta-
tion.
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, and un-
switched audio for critical alerts, copilot communications on COM 2, pilot navi-
gation audio 1 if stereo headsets are used,. 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 infor-
mation
Removal: The PAC45D/CTL45 is attached to the aircraft using ¼-turn Dzus fas-
teners. To release, insert a slotted screwdriver into the head and turn counter-
clockwise. Release the wiring connectors by sliding the latches from the retain-
ing standoff.
The HUB45R is attached to the aircraft using four #6 screws on the flanges.
Installation: Reverse the connector installation process. Place the unit against
the Dzus rail and with the slotted screwdriver push gently and turn ¼-turn to
secure.
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
PRELIMINARY
