SECTION 9 - SUPPLEMENTS
CESSNA
SUPPLEMENT 9
MODEL 172S NAV III
U.S.
FAA APPROVED
ARTEX ME406 EMERGENCY LOCATOR
TRANSMITTER (ELT)
GENERAL
The Artex ME406 Emergency Locator Transmitter (ELT) installation
uses a solid-state 2-frequency transmitter powered by an internal
lithium battery. The ME406 is also equipped with an instrument panel-
mounted remote switch assembly, that includes a red warning light, and
an external antenna mounted on the top of the tailcone. The remote
switch assembly is installed along the upper right instrument panel and
controls ELT operating modes from the flight crew station. When the
remote switch is set to the ARM position, the transmitter is energized
only when the internal "G” switch senses longitudinal inertia forces per
TSO-C91a/TSO-C126. When the remote switch is set to the ON
position, the transmitter is immediately energized.
The ME406 transmitter unit is located in the tailcone along the right
side behind the baggage compartment aft panel. On the ELT
transmitter unit is a panel containing an ARM/ON switch and a
transmitter warning light.
The ELT installation uses two different warnings to tell the pilot when
the ELT is energized. The aural warning is an unusual sound that is
easily heard by the pilot. The visual warning is a flashing red light
directly above the remote switch that shows the pilot that the ELT has
been activated.
When the ME406 is energized, the ELT transmits the standard swept
tone signal on the international VHF frequency of 121.5 MHz until
battery power is gone. The 121.5 MHz signal is mainly used to pinpoint
the beacon during search and rescue operations, and is monitored by
general aviation, commercial aircraft, and government agencies.
In addition, for the first 24 hours of the ELT being energized, a 406.028
MHz signal is transmitted at 50 second intervals. This transmission
lasts 440 milliseconds and contains identification data programmed into
the ELT and is received by COSPAS/SARSAT satellites. The
transmitted data may include the Aircraft ID, ELT Serial Number,
Country Code, and COSPAS/SARSAT ID.
(Continued Next Page)
172SPHAUS-S9-00
S9-4
For
Training
Purposes
Only
Summary of Contents for Cessna 172S NAV III Skyhawk SP
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