Troubleshooting guide

ARTEX AIRCRAFT SUPPLIES, INC. 570-1600
Flex circuit ...........A flex circuit is a printed wiring board that is made on a heavy gauge flexible
tape.
G-switch ..............A special type of switch that momentarily closes during a sudden acceleration
or deceleration. Switch is calibrated at a specified threshold.
Lanyard ...............A short string or wire that connects two items together so that they do not
become separated.
LED.....................Light Emitting Diode – Semiconductor device that emits light when current is
passed through it. Most common colors are red, green and blue. White and
yellow are also possible.
Mil-Spec ..............The US military specifications that apply to wire, hardware, electronic
components, etc. Quality is usually very high.
P/N .....................Artex part number.
Retrofit................To install new parts or equipment into an existing system.
RF.......................Radio Frequency – Usually means the actual transmission of energy, e.g.
“The radio transmits RF”.
RTCA...................Radio Technical Commission for Aeronautics – Organization that makes
recommendations for airworthiness. Refer to
http://www.rtca.org/aboutrtca.asp for more information.
RTV.....................A rubbery silicon-based adhesive, typically used to prevent vibration
problems and water intrusion.
STC.....................Supplemental Type Certificate – A type certificate (TC) issued when an
applicant has received FAA approval to modify an aircraft from its original
design. The STC, which incorporates by reference the related TC, approves
not only the modification but also how that modification affects the original
design.
TSO.....................Technical Standard Order – The Federal Aviation Administration issues TSOs
to indicate approval for use on aircraft of a manufactured item.
VHF.....................Very High Frequency – A band of the radio frequency spectrum. It is the
frequency range from 30 MHz to 300 MHz.
VSWR..................Voltage Standing Wave Ratio – Electrical signals will “echo” back on the wire
if the load impedance is not matched to the impedance of the wire. The
VSWR is a measurement of the amount of voltage being “echoed,” compared
to the original signal.
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