PS Engineering, Inc.
IntelliPAX Expansion Unit
200-250-0005
Page
A
Rev. 14, Jan. 2012
Appendix A Instructions for FAA Form 337 and Airworthiness
5.1
Sample text for FAA Form 337
One method of airworthiness approval is through an FAA Form 337,
Major Repair and Alteration (Airframe,
Powerplant, Propeller, or Appliance)
In the case of the IntelliPAX part number 116( ), you may use the
following text as a guide.
Installed intercom expansion unit, PS Engineering IntelliPAX, part number 11616 in (
location
) at
station
. Installed per AC43.13-2B, Chapter 2, Installed per PS Engineering
Installation
Operators Manual
p/n 200-250-xxxx, revision X, dated ( ).
Interface to existing audio system 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. No connection to
the aircraft dimmer bus is required. No additional connection to aircraft power is made.
Aircraft equipment list, weight and balance amended. Compass compensation checked. A copy of the
operation instructions, contained in PS Engineering document 200-250-( ), revision ( ), Dated ( ), is
placed in the aircraft records. All work accomplished listed on Work Order
.
5.2
Instructions for Continued Airworthiness:
Section
Item
Information
1
Introduction
Installation of passenger 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 main unit into “OFF,” the fail-safe
mode. This allows normal 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
information
Removal: Remove Volume knob (if equipped (11606, 11616), 2 ea. then #4-
40 black machine screws mounting the unit. Remove unit from behind panel.
Place metal faceplate in a safe area.
Installation: Align the volume knob shaft (if equipped, 11606, 11616) and the
mounting holes with the panel and front plate. Secure using 2 ea. #4-40 black
screws, provided.
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
