PS Engineering PAC24 Installation Manual - Manual (Page 39)

PS Engineering
PAC24 Series Audio Selector Panel and Intercom System
Installation and Operator’s Manual
200-240-0010 Appendix C Rev. 24, Dec. 2013
Appendix C- Instructions for FAA Form 337 and continuing
airworthiness
8.1 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 PAC24, you may use the following text as a guide.
Installed audio selector and 6-place intercom, PS Engineering PAC24, part number 050-240- (XXX) in (
location ) at station
. Installed per AC43.13-2B, Chapter 2, Installed per PS Engineering Installation
Operators Manual p/n 200-240-(XXXX), revision (), dated ( ).
This unit is FAA-Approved under TSO C50c for audio amplifiers, 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 AC43.13-2B, 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 PAC24
added.
Aircraft equipment list, weights and balance amended. Compass compensation checked. A copy of the op-
eration instructions, contained in PS Engineering document 200-240-( ), revision ( ), dated ( ), is placed in
the aircraft records. All work accomplished listed on Work Order
.
8.2 Instructions for Continuing Airworthiness, Audio Panels
Sample ICA Checklist for PS Engineering Audio Panels:
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