Installation Manual For 8300-013 Rev C Automatic Pitch Trim TRUTRAK FLIGHT SYSTEMS 1500 S. Old Missouri Road Springdale, AR 72764 Ph: 479-751-0250 Fax: 479-751-3397 www.trutrakap.
IT IS THE INSTALLERS RESPONSIBILITY TO ENSURE THAT THE TRIM SYSTEM DOES NOT EXCEED THE ABILITY OF THE PILOT TO CONTROL THE AIRCRAFT AT ANY SPEED WITH THE TRIM TAB AT FULL DEFLECTION IN EITHER POSITION. IF UNABLE TO MAINTAIN FLIGHT CONTROL WITH THE TRIM TABS AT FULL DEFLECTION THEN STOPS WILL BE NEEDED IN THE AIRCRAFT TRIM SYSTEM.
Table of Contents Electrical Pin-Out.................................................................................................................1 Automatic Pitch Trim Ground Checkout..........................................................................2 Retrofit to existing autopilot harness .................................................................................3 Pitch Auto Trim Block Diagram.........................................................................................
Electrical Pin-Out The table below provides a brief explanation of each pin function on the 25-pin connector P101. 1 2 3 4 5 6 7 8 9 10 11 12 13 25-Pin Connector P101 14 15 16 17 18 19 20 21 22 23 24 25 P101 Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Function No Connection. Reserved for future expansion. No Connection. Reserved for future expansion. Pitch Servo Trim Sensor. Pitch servo trim sensor output to autopilot programmer. Pitch Servo Trim Sensor.
Automatic Pitch Trim Ground Checkout Power up autopilot. Red light ON auto trim module at #1 small slot Engage autopilot Red light OFF on the auto trim module at #1 small slot Apply up elevator pressure.
Retrofit to existing autopilot harness Pitch Auto Trim Block Diagram Auto Trim Installation Manual December 2009 3 TruTrak Flight Systems 8300-013 Rev C
Roll Auto Trim Block Diagram 28 Volt Aircraft with 12 Volt Trim System The Voltage that is supplied to the Auto Trim system will drive the trim motor with the same voltage when the Auto Trim system is in operation. The pitch servo and the auto trim system do NOT need to be supplied with the same voltage to work correctly.
Manual Auto Trim Switching with Auto Pilot Engaged Trouble Shooting Problem Trim motor will not move with control pressure and manual trim control is functional Trim motor will not move & manual trim control nonfunctional Trim motor only runs in one direction Trim bar briefly shows on autopilot display Aircraft hunts up & down in pitch Auto Trim Installation Manual December 2009 Cause Corrective Action No aircraft voltage and/or torque voltage to auto trim system Correct power, ground, & torque wiring
RETURN MERCHANDISE POLICY AND PROCEDURE Under no circumstances should products be returned to TruTrak without first obtaining a Return of Merchandise Authorization number (RMA #) from TruTrak. An RMA # may be obtained by contacting us at 866-878-8725. Products that do not have an RMA # will not be processed. Please include some form of documentation stating the reason for the return and describing any symptoms, failure modes, suspected causes of damage, diagnostics performed, data collected, etc.
Auto Trim Installation Manual December 2009 7 TruTrak Flight Systems 8300-013 Rev C
THIS PAGE UNINTENTIONAL LEFT BLANK Auto Trim Installation Manual December 2009 8 TruTrak Flight Systems 8300-013 Rev C
TRUTRAK FLIGHT SYSTEMS 1500 S. Old Missouri Road Springdale, AR 72764 Ph: 479-751-0250 Fax: 479-751-3397 Toll free: 866-TRUTRAK 866-(878-8725) www.trutrakap.
