Avionics News July 2019 - 34

TROUBLESHOOTING TRIUMPHS
Continued from page 33

Part 23
About halfway through his 32-year bench tech and
troubleshooting career, Jim Karpowitz faced off with an
autopilot at Skycom Avionics in Waukesha, Wisconsin.
Explaining what their lines look like, he said that a
mechanic at another shop inadvertently blew up the
Beech Baron's static system when he meant to purge its
air conditioning lines with 40 pounds per square inch of
compressed air.
Like the other static connections (altimeter, airspeed,
and vertical speed indicator), the autopilot's altitude hold
chamber needed repairs. It returned from the factory with
a clean bill of health, but back in the Baron, the owner
said it would not hold the selected altitude.
Karpowitz subjected the old school analog autopilot to

Factory Authorized

IF YOU'RE READING THIS TO DIVERT
YOUR MIND FROM A VEXING,
SEEMINGLY UNSOLVABLE PROBLEM,

YOU MAY QUESTION THE
REWARD COMPONENT OF
THE TROUBLESHOOTING
EQUATION.
a thorough ground check, and on its next flight it would
either climb or descend from the selected altitude. So it
went back to the factory and returned with another clean
bill of health. And it still wouldn't hold altitude.
Diving into the manual and wiring diagrams,
Karpowitz refused to let the box beat him. "Long story

Service Center & Dealer

Call 770-486-6061 or visit us at
www.pas-pag.com.

34

avionics news

*

july

2019

Hydraulics
Accessories
Instruments
Wheels & Brakes
Starter Generators



http://www.pas-pag.com

Avionics News July 2019

Table of Contents for the Digital Edition of Avionics News July 2019

No label
Avionics News July 2019 - Intro
Avionics News July 2019 - No label
Avionics News July 2019 - Cover2
Avionics News July 2019 - 1
Avionics News July 2019 - 2
Avionics News July 2019 - 3
Avionics News July 2019 - 4
Avionics News July 2019 - 5
Avionics News July 2019 - 6
Avionics News July 2019 - 7
Avionics News July 2019 - 8
Avionics News July 2019 - 9
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Avionics News July 2019 - 11
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Avionics News July 2019 - 28
Avionics News July 2019 - 29
Avionics News July 2019 - 30
Avionics News July 2019 - 31
Avionics News July 2019 - 32
Avionics News July 2019 - 33
Avionics News July 2019 - 34
Avionics News July 2019 - 35
Avionics News July 2019 - 36
Avionics News July 2019 - 37
Avionics News July 2019 - 38
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Avionics News July 2019 - Cover3
Avionics News July 2019 - Cover4
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