Avionics News July 2021 - 31

Photos courtesy of Gulf Coast Wing CAF
Texas Raiders test flying its new avionics and intercom.
outside for most of the eight-year rebuild that addressed
a wing spar airworthiness directive, he explained.
" All of the boxes were connected in series, so if
one was having a problem, all of them went down, "
Barker said. " Headsets were another variable. Some
headsets would get carrier but no voice, or you'd get
side tone, but you couldn't talk over it. " (A sponsorship
arrangement with Gulf Coast Avionics has since solved
that problem with an active noise reduction headset for
each station.)
But wait, there's more, he said. Having volume
controls on the cockpit audio panel, on each jack box,
and on each headset didn't make troubleshooting the
ICS any easier. Then there were all the push-to-talk
switches, especially those on the pilot yokes.
" They were a problem on check flights. To
communicate with the other pilot during takeoff, the IP
has to remove his hand from the throttles to hit the PTT
on the yoke, " said Root, the wing's instructor pilot who
knew a voice-activated system would improve safety.
" I've been trying to do something about the intercom
for the past five or six years, " he said, not to mention
the overhead avionics rack. When Garmin equipment
replaced the King stack, the rack hung just forward of
the pilots, and every couple of years a pilot would incur
some forehead damage or break a knob off the Garmins.
Continued on following page
avionics news * july 2021 31

Avionics News July 2021

Table of Contents for the Digital Edition of Avionics News July 2021

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Avionics News July 2021 - Intro
Avionics News July 2021 - No label
Avionics News July 2021 - Cover2
Avionics News July 2021 - 1
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Avionics News July 2021 - Cover3
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