Avionics News October 2012 - 52

AUTOPILOT UPGRADES
Continued from page 50

surfaces, limit switches set correctly or clutch tension set correctly,” Hall added. “Doing those first will make it much easier to complete the installation. Some airplanes have wiring more than 20 years old. Inspect it; make sure everything is correct, good continuity. If necessary, install new wiring. In some cases, you may find the wrong wire gauge was used in

older installs; old analog autopilot could tolerate that, digitals aren’t so forgiving.” Evans recommended a complete ground check after installation. “Years ago, I had an experience with a servo that ran backwards,” Evans said. “Manual elevator trim worked correctly, but the automatic elevator trim was reversed. In flight, it commanded full down trim. The clutch held it until it disconnected, and then everyone’s head hit the ceiling. That should have been

checked before flight. You really want to make sure the system is doing what it’s supposed to do.” A flight test is required after installation, and Evans noted “An IFR day is not a good day to do an autopilot flight check. You do not want to start by engaging the autopilot when the gear comes up. You want to be away from traffic, in level flight, and with enough altitude to recover if something
Continued on page 54

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Avionics News October 2012

Table of Contents for the Digital Edition of Avionics News October 2012

Point of Communication
AEA Now
The View From Washington
International News and Regulatory Updates
Lightning Detection & Datalink
Member Profile
Cockpit Innovations
Member Profile
A Conversation With...
Understanding Autopilot Upgrades
Before & After
Member Profile
Pro-to-col
Business Basics
Theory & Practice
What's New
Marketplace Classifieds
Avionics News October 2012 - Intro
Avionics News October 2012 - Cover1
Avionics News October 2012 - Cover2
Avionics News October 2012 - 1
Avionics News October 2012 - 2
Avionics News October 2012 - 3
Avionics News October 2012 - Point of Communication
Avionics News October 2012 - 5
Avionics News October 2012 - AEA Now
Avionics News October 2012 - 7
Avionics News October 2012 - 8
Avionics News October 2012 - 9
Avionics News October 2012 - 10
Avionics News October 2012 - 11
Avionics News October 2012 - 12
Avionics News October 2012 - 13
Avionics News October 2012 - The View From Washington
Avionics News October 2012 - 15
Avionics News October 2012 - International News and Regulatory Updates
Avionics News October 2012 - 17
Avionics News October 2012 - 18
Avionics News October 2012 - 19
Avionics News October 2012 - Lightning Detection & Datalink
Avionics News October 2012 - 21
Avionics News October 2012 - 22
Avionics News October 2012 - 23
Avionics News October 2012 - 24
Avionics News October 2012 - 25
Avionics News October 2012 - 26
Avionics News October 2012 - 27
Avionics News October 2012 - Member Profile
Avionics News October 2012 - 29
Avionics News October 2012 - 30
Avionics News October 2012 - 31
Avionics News October 2012 - Cockpit Innovations
Avionics News October 2012 - 33
Avionics News October 2012 - 34
Avionics News October 2012 - 35
Avionics News October 2012 - 36
Avionics News October 2012 - 37
Avionics News October 2012 - 38
Avionics News October 2012 - 39
Avionics News October 2012 - Member Profile
Avionics News October 2012 - 41
Avionics News October 2012 - 42
Avionics News October 2012 - 43
Avionics News October 2012 - A Conversation With...
Avionics News October 2012 - 45
Avionics News October 2012 - Understanding Autopilot Upgrades
Avionics News October 2012 - 47
Avionics News October 2012 - 48
Avionics News October 2012 - 49
Avionics News October 2012 - 50
Avionics News October 2012 - 51
Avionics News October 2012 - 52
Avionics News October 2012 - 53
Avionics News October 2012 - 54
Avionics News October 2012 - 55
Avionics News October 2012 - Before & After
Avionics News October 2012 - 57
Avionics News October 2012 - Member Profile
Avionics News October 2012 - 59
Avionics News October 2012 - 60
Avionics News October 2012 - 61
Avionics News October 2012 - Pro-to-col
Avionics News October 2012 - 63
Avionics News October 2012 - 64
Avionics News October 2012 - 65
Avionics News October 2012 - Business Basics
Avionics News October 2012 - 67
Avionics News October 2012 - 68
Avionics News October 2012 - 69
Avionics News October 2012 - Theory & Practice
Avionics News October 2012 - 71
Avionics News October 2012 - 72
Avionics News October 2012 - 73
Avionics News October 2012 - What's New
Avionics News October 2012 - 75
Avionics News October 2012 - 76
Avionics News October 2012 - 77
Avionics News October 2012 - Marketplace Classifieds
Avionics News October 2012 - 79
Avionics News October 2012 - 80
Avionics News October 2012 - Cover3
Avionics News October 2012 - Cover4
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