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co-pilot and passenger head-sets.
(5) Test the function of the VOLUME control.
(6) Test the function of the SQUELCH control.
(7) Set the mode switch to ISO. Make sure that there is no intercom
between the pilot, co-pilot and
passenger head-sets.
(8) Pull the AUDIO circuit-breaker. Make sure that radio transmission and
reception is possible from the pilot's
head-set.
(9) Set the mode switch to CREW. Make sure that the pilot and co-pilot can
communicate and transmit on the
airplane radio. Make sure that the
passengers can communicate with
themselves but not to the pilot or copilot.
AIRCRAFT
DA 40 Series
AMM
Communications
Doc # 6.02.01
Rev. 5 23-50-00 Page 207
20 Sep 2007
6. Test the Audio Panel
A. Intercom Functions
This paragraph applies to the KMA 28 and GMA 340 audio panels.
Detail Steps/Work Items Key Items/References
(1) Make sure that all the head-sets are connected.
(2) Switch the unit ON.
(3) Select the ALL mode.
(4) Do a test for communication between the pilot,
co-pilot and passenger head-sets.
(5) Test the function of the VOLUME control.
(6) Test the function of the squelch control.
(7) Select the ISO mode (KMA 28) or PILOT mode
(GMA 340).
Make sure that there is no intercom
between the pilot, co-pilot and
passenger head-sets.
(8) Pull the AUDIO circuit-breaker. Make sure that radio transmission and
reception is possible from the pilot's
head-set.
(9) Select the CREW mode. Make sure that the pilot and co-pilot can
communicate and transmit on the
airplane radio. Make sure that the
passengers can communicate with
themselves but not to the pilot or copilot.
AIRCRAFT
Communications DA 40 Series
AMM
Page 208
20 Sep 2007 23-50-00 Doc # 6.02.01
Rev. 5
B. KMA 28 Audio Selector and Marker Beacon Receiver Functions
Detail Steps/Work Items Key Items/References
(1) Make sure that all the head-sets are connected.
(2) Set the ALT/BAT switch (Lycoming version) or
ELECTRIC MASTER key switch (TAE version) to
ON.
(3) Set AVIONIC MASTER switch to ON.
(4) Push the VOL knob to switch the unit ON.
(5) Set the mic selector rotary switch to COM 1. Make sure that:
S The green LED in the COM 1 button
comes on.
S The green TRANSMIT LED does
not come on.
(6) Do a test transmission on COM 1 from the copilot
station.
Make sure that:
S The PTT button gives proper
transmission on COM 1.
(7) Push the COM 2 button. Make sure that:
S The green LED in the COM 2 button
comes on.
S The COM 2 receiver can be heard.
(8) Do a test transmission on COM 1 from the pilot
station.
Make sure that:
S The PTT button gives proper
transmission on COM 1.
(9) Push the COM 2 button. Make sure that:
S The green LED in the COM 2 button
comes on.
S The COM 2 receiver can be heard.
(10) Set the mic selector rotary switch to COM 2. Make sure that:
S The green LED in the COM 2 button
comes on.
S The green TRANSMIT LED does
not come on.
AIRCRAFT
DA 40 Series
AMM
Communications
Detail Steps/Work Items Key Items/References
Doc # 6.02.01
Rev. 5 23-50-00 Page 209
20 Sep 2007
(11) Do a test transmission on COM 2 from the copilot
station.
Make sure that:
S The PTT button gives proper
transmission on COM 2.
(12) Push the COM 1 button. Make sure that:
S The green LED in the COM 1 button
comes on.
S The COM 1 receiver can be heard.
(13) Do a test transmission on COM 2 from the pilot
station.
Make sure that:
S The PTT button gives proper
transmission on COM 2.
(14) Push the COM 1 button. Make sure that:
S The green LED in the COM 1 button
comes on.
S The COM 1 receiver can be heard
(15) Turn the mic selector switch to the COM 1/2
position.
Make sure that:
S The pilot can communicate on COM
1.
S The co-pilot can communicate on
COM 2.
(16) Turn the mic selector switch to the COM 2/1
position.
Make sure that:
S The pilot can communicate on COM
2.
S The co-pilot can communicate on
COM 1.
AIRCRAFT
Communications DA 40 Series
AMM
Detail Steps/Work Items Key Items/References
Page 210
20 Sep 2007 23-50-00 Doc # 6.02.01
Rev. 5
(17) Select each receiver in turn using the selector
buttons.
Make sure that:
S The button latches correctly.
S The LED in the button comes on to
show that it is in use.
S Audio from each selected
equipment connects to the headsets.
　
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