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% 406.028 MHz . The battery in the ELT supplies power to the transmitter. The battery can
% operate the ELT for at least 50 hours.
% (b) Test
% • If you switch the RCS to ‘ON’, then the following occurs:
% • A LED flashes in the RCS and the ELT unit.
% • If you set the radio to 121.5 MHz, you can hear the audio sweep tone from the ELT.
% (2) Remote Control Switch (RCS)
% The RCS is installed on the right side of the instrument panel and has a red LED to indicate the
% activation of the ELT. When it is switched to 'ON' it does a test of the ELT. When you switch it
% back to 'ARM' the switch stops the test of the ELT. The red LED flashes when you test the ELT.
% If a problem has been detected the LED provides a coded signal following the initial 1 second
% pulse.
%
AIRCRAFT
DA 40 Series
AMM Equipment/Furnishings
Doc # 6.02.01
Rev. 5 25-60-00 Page 9
20 Sep 2007
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% Figure 3: ELT (C406-1)
AIRCRAFT
Equipment/Furnishings
DA 40 Series
AMM
Page 10
20 Sep 2007 25-60-00 Doc # 6.02.01
Rev. 5
% D. C 406-1
% (1) ELT
% The ELT has a switch with these 2 positions:
% ) ON
% ) OFF/ARMED
% The ON position is for ground test. When the airplane is in use the switch must be in the OFF
% position.
% (a) Emergency Operation
% If the airplane crashes, then the accelerometer senses the crash. The accelerometer sets the
% transmitter to ON. The transmitter transmits on the international distress frequencies and on
% 406.025 MHz every 50 seconds for 520 milliseconds. The 406.025 MHz transmitter will operate
% for 24 hours and then shuts down automatically. The 121.5/243.0 MHz transmitter will continue
% to operate until the unit has exhausted the battery power which typically will be at least 72 hours.
% (b) Test
% If you switch the RCS to 'ON', then the following occurs:
% • An LED flashes in the RCS and in the ELT unit.
% • If you set the radio to 121.5 MHz, you can hear the audio sweep tone from the ELT.
% (2) Remote Control Switch (RCS)
% The RCS is installed on the right side of the instrument panel and has a red LED to indicate the
% activation of the ELT. When it is switched to 'ON' it does a test of the ELT. When you switch it
% back to 'ARM' the switch stops the test of the ELT. The red LED flashes when you test the ELT.
% If a problem has been detected the LED provides a coded signal following the initial 1 second
% pulse.
AIRCRAFT
DA 40 Series
AMM Equipment/Furnishings
Doc # 6.02.01
Rev. 5 25-60-00 Page 101
20 Sep 2007
Trouble-Shooting
1. General
If you find the trouble given in Column 1, then do the repair in Column 3.
Trouble Possible Cause Repair
ELT does not operate on test. ELT batteries discharged.
ELT defective.
RCPI battery discharged (ACK
only).
RCPI/cables defective (ACK
only).
Replace the ELT batteries.
If the ELT batteries are
serviceable, then replace the
ELT.
Replace the RCPI battery.
Do a continuity test of the
cables between the RCPI and
the ELT. Replace defective
cables. If the cables are not
defective then replace the
RCPI.
AIRCRAFT
Equipment/Furnishings
DA 40 Series
AMM
Page 102
20 Sep 2007 25-60-00 Doc # 6.02.01
Rev. 5
Intentionally left blank
AIRCRAFT
DA 40 Series
AMM Equipment/Furnishings
Doc # 6.02.01
Rev. 5 25-60-00 Page 201
20 Sep 2007
Maintenance Practices
1. General
This Section tells you how to remove and install the ELT and the RCPI or the RCS. It tells you how to
test the ELT in the airplane. It also tells you how replace the batteries in the ELT and the RCPI. This
Section also gives you the periodic maintenance necessary to maintain the ELT equipment in a
serviceable condition.
See the ELT manufacturer's Operator’s Manual for more data.
2. Remove/Install the ELT
A. Remove the ELT
Detail Steps/Work Items Key Items/References
(1) Remove the trim/cover from the front face of the
baggage compartment frame.
Pull the rear seat-backs forward.
(2) ACK E-01:
S Disconnect the cable for the RCPI at the inline
connector.
Jolliet JE2-NG:
S Disconnect the cable for the RCS at the
connector screws.
% ME 406, ME 406 ACE, C 406-1:
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