COMMUNICATIONS, VHF COM
Description
Aircraft Operations Manual
4/3.1
PAGE
4
Apr 01/15
A27911
B
B
OXY
MASK
BOOM
PA
BOOM
B
PILOTS JACK PANEL
A
A
XMIT SELECT
HOT
MIC
COLD
BOOM
MASK
NORM
EMER
1 COM 2 COM 3
HF
INT
VOICE
IDENT
PTT
1 NAV 2
PA
SPKR
MKR
1 ADF 2
A
AUDIO CONTROL PANEL
1.
3.
2.
Oxygen mask use.
The oxygen mask microphone plug is
normally connected to the OXY MASK re-
ceptacle (1) and with the BOOM/MASK
switch (2) set to MASK when oxygen mask
in use.
If the ACP fails and/or NORM/EMER switch
is set to EMER when oxygen mask in use,
the oxygen mask microphone plug must be
connected to the BOOM microphone recep-
tacle (3) to provide microphone function.
Disconnect the headset microphone plug
and connect the oxygen mask microphone
plug.
Fig. 4 ACP failure and NORM EMERG switch
−
oxygen mask use