PS Engineering PM1000 - Manual (Page 6)

PS Engineering Incorporated
PM 1000 FAA TSO Approved Intercom
Installation and Operation Manual
200-190-0002 11 Rev. 2, Jan. 2001
4.2 Factory Service
The PM1000 is covered by a one-year limited warranty. See warranty information.
Call PS Engineering, Inc. at (865) 988-9800 before you return the unit. This will allow the service technician
to provide any other suggestions for identifying the problem and recommend possible solutions.
After discussing the problem with the technician and you obtain a Return Authorization Number, ship product
to:
PS Engineering, Inc.
Service Department
9800 Martel Road
Lenoir City, TN 37772
(865) 988-9800 FAX (865) 988-6619
PS Engineering Incorporated
PM 1000 FAA TSO Approved Intercom
Installation and Operation Manual
200-190-0002 12 Rev. 2, Jan. 2001
Appendix A — PTT Modifications
When received from the manufacturer, an after-market PTT switch opens the mic audio path to the "ring"
connection of the PTT mic plug. When the PTT is between the intercom and the headset, the intercom
function will not work until the PTT switch is depressed. A simple modification can be performed to allow
proper intercom operation. NOTE: This mod does not alter normal operation. The following are sample
procedures for common PTT switches. Contact the PTT manufacturer if you require more information.
Procedures for the David Clark PTT
1. Unscrew the round black plastic cover from the jack.
2. Connect the joined black wires to the red wire
3. Replace the plastic cover.
Procedures for the Telex PT-200
1. Unscrew the round black plastic cover from the jack.
2. Cut the red wire in the middle of the wire.
3. Strip both ends of the insulation.
4. Solder the two ends to the ground lug to the PTT jack
5. Replace the plastic cover.
Procedures for the Telex PT-300
1. Unscrew the round black plastic cover from the jack.
2. Remove the heat shrink material from the joined black wires.
3. Solder these two wires to the lug that has a white wire already soldered to it.
4. Replace the plastic cover.
6. Appendix B Instructions 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 PMA1000II 11920, you may use the following text as
a guide.
Installed 2-place intercom, PS Engineering PM1000, part number 11900 in ( location ) at station . Installed per
AC43.13-2, Chapter 2, paragraph 23 (Instrument Panel Mounting). Installed per PS Engineering Installation Operators
Manual p/n 200-190-0001, revision 1, dated Nov. 1998.
This unit is FAA-Approved under TSO C50c for audio amplifiers, and meets environmental tests outlined in RTCA DO-
170B 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. No connection to the aircraft dimmer bus is required.
Power is supplied to the unit through a 1A circuit breaker (type and part number), and total electrical load does not
exceed % of the electrical system capacity with the PMA1000 added.
Aircraft equipment list, weight and balance amended. Compass compensation checked. A copy of the operation
instructions, contained in PS Engineering document 200-190-0001, Revision 1, November 1998, is placed in the aircraft
records. All work accomplished listed on Work Order .