Section 926
ARTEX ME-406 ELT
Page Date: 31. March 2009
926 - 3
Pilot´s Operating Handbook
EXTRA 300L
926.1
GENERAL
To improve the passive security, the EXTRA 300/L can be equipped with an optional Emergency
Locator Transmitter ARTEX ME-406.
In the event of a crash, the ME-406 activates automatically (automatic fixed „AF“ configuration), and
transmits the standard swept tone on 121.5 MHz lasting until battery power is gone. This 121.5 MHz
signal is mainly used to pinpoint the beacon during search and rescue operations.
In addition, for the first 24 hours of operation, a 406 MHz signal is transmitted at 50-second intervals.
This transmission lasts 440 ms and contains identification data programmed into the beacon and
is received by Cospas-Sarsat satellites. The transmitted data is referenced in a database
(maintained by the national authority responsible for ELT registration) and used to identify the
beacon and owner.
When the ELT is activated, the buzzer ‘beeps’ and the panel LED pulses periodically. The time
between pulses lengthen after a predetermined transmitter ‘on’ time.
N O T E
In October 2000 the International Cospas-Sarsat Program, announced at its 25th Council
Session held in London, UK that it plans to terminate satellite processing of distress signals
from 121.5 and 243 MHz emergency beacons on February 1, 2009.
Accuracy
Doppler positioning is employed using both 121.5 MHz and 406 MHz signals. Position accuracy
of the 121.5 MHz signal is within an area of approximately 15-20 km radius about the transmitter.
Due to the better signal integrity of the 406 MHz, its location accuracy is within about a 3 km radius.
926.2
LIMITATIONS
The operation limitations are not effected due to the installation of the ARTEX ME-406 ELT.
For the location and operation of the transmitter the following placards have to be attached to the
aircraft:
(outside on the left fuselage in the vicinity of the ELT unit)
ELT
(above the ELT circuit breaker; circuit breaker and placard installed up tp SN 1320 only)
(next to the ELT remote switch)
(as close to the ELT remote switch as practical)
Page Date: 19. April 2012
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