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INSTALLATION SECRETS
Install Essentials
(partial reprint from December 95 Approach)

Scott Howard, Manager, Customer Service

The installation of a new autopilot is more complex and involved than the average avionics installation. It's certainly more than just mounting black boxes connected to A+ and ground. When you install a new autopilot you are tying into the primary flight controls of the aircraft, interfacing with navigation equipment and connecting to the aircraft electrical system.

For the new autopilot system to work properly and up to its maximum performance capabilities, it is dependent on all the systems it is linked to and their performance. If any of these systems are not performing up to par, the autopilot system's performance could be compromised. Therefore, at the beginning of an installation it is recommended that the performance of these systems be checked by the installer.

Check to see if the control cable tensions meet the manufacturers specifications. Check to assure the control travel is within specified limits and that there is no stiffness or binding in the aircraft flight control system.When connecting to the DC buss, check for the proper voltage output and be sure there is no AC ripple when the aircraft charging system is operating.

Navigational and other avionics equipment must be delivering optimum outputs to assure that the autopilot which is interfacing with them will perform properly. Be sure and check the outputs against manufacturers specifications at the outset.

When routing the harness avoid bundling with transmitter coaxes and any cable carrying high current or alternating current.