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Manual for more data.
2. ELT Functional Test
Note: Do this test only during the first 5 minutes of each hour. If you are at a location
with a control tower or other monitoring facility, tell them before you do the test.
Detail Steps/Work Items Key Items
(1) Set the master switch to ON.
(2) Set the radio to receive on 121.5 MHz.
(3) Set the ELT to ON. The test must not last longer than 3 audio
sweeps.
(4) Monitor the radio for the ELT sweep tone.
(5) Set the ELT to OFF.
(6) Set the master switch to OFF.
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CHAPTER 25-60-01
EMERGENCY LOCATOR TRANSMITTER (ELT)
1. General
This Section tells you about the optional ARTEX Emergency Location Transmitter (ELT) model ME
406. Refer to the manufacturer's Operator’s Manual for more data.
2. Description
A. ELT Equipment
(1) Location
The ME 406 ELT is located in the right side of the rear fuselage compartment on top of
baggage tray. A Velcro strap attached to a mounting bracket holds the ME 406 ELT in
position. The ME 406 ELT has an antenna and is installed into side bracket hole in
accordance with Artex ME406 Manual.
(2) Signal Transmission
The ME 406 ELT transmits signals automatically after a crash on the emergency frequencies
of 121.5 and 406.028 Megahertz (MHz). Every 50 seconds the transmitter transmits a signal
on the 406.028 MHz frequency to a satellite. The signal to the satellite contains the serial
number of the ELT transmitter or the airplane ID, a country code and a unique identity code.
The satellite will also give the emergency services a more accurate location for the airplane.
(3) Functional Test
Do regular functional tests (See the Maintenance Practices in this Section).
B. ELT Batteries
The ME 406 ELT has its own battery pack to supply electrical power. When the ELT is ON and
transmitting, the batteries will keep the ELT transmitting the 121.5 MHz frequency until battery
power is drained out and will transmit the 406.028 MHz frequency for up to 24 hours.
It is important to monitor the battery expiry dates for the battery pack. The expiry date for the
battery pack is shown on the identity plate for the transmitter. The battery pack must be
replaced:
• After use in an emergency.
• After the transmitter has been accidentally switched ON for an unknown period of time.
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• After 1 hour of accumulated use (testing).
• On or before the battery pack expiry date.
3. Operation
A. ELT
The ELT has a switch with these 2 positions:
• ON
• ARM
The ON position is for ground test. When the airplane is in use, the switch must be in the ARM
position.
(1) Emergency Operation
If the airplane crashes, then the accelerometer senses the crash. The accelerometer sets
the transmitter to ON. The transmitter transmits the international distress frequency and on
406.028 MHz. The battery in the ELT supplies power to the transmitter. The battery can
operate the ELT for at least 50 hours.
(2) Test
If you switch the ELT to ‘ON’, then the following occurs:
• A LED flashes in the ELT unit.
• Note: If more than 1 flash is observed, refer to the Artex Installation Manual: 570-1600.
• If you set the radio to 121.5 MHz, you can hear three audio sweeps tone from the ELT.
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TROUBLE- SHOOTING
1. General
If you find the trouble given in Column 1, then do the repair in Column 3.
Complaint Possible Cause Remedy
ELT does not operate on test. ELT batteries discharged. Replace the ELT batteries.
ELT defective. If the ELT batteries are
serviceable, then replace the
ELT.
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MAINTENANCE PRACTICES
1. General
This Section tells you how to:
• remove and install the ELT
• test the ELT in the airplane
• replace the batteries in the ELT.
This Section also gives you the periodic maintenance necessary to maintain the ELT equipment in
a serviceable condition.
2. Remove/Install the ELT
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