(5) The instructor deselects trainee private communications by:
(a) Pressing the same switchlight.
( b ) Selecting another interlocked switchlight.
c. Trainee Monitor (MON PILOT, MON CPG). The following criteria apply:
(1) In integrated mode, either instructor and either observer can monitor
pilot or CPG communications.
(2) In independent mode:
(a) Both the pilot instructor and the pilot observer can monitor pilot
(b) Both the CPG instructor and CPG observer can monitor CPG communications.
(3) An instructor or observer initiates the monitor function by pressing the
associated switchlight on the IOS COMM control panel. The selected switchlight is
lit steadily, and the pertinent trainee headset audio is gated to the monitor input
in the instructor or observer audio system.
(4) The light is extinguished and the audio monitor terminated when the
instructor or observer presses the monitor switchlight that is lit.
d. Radio Communications (PILOT VHF, CPG VHF, UHF). The following criteria apply:
(1) In integrated mode:
(a) Either instructor can communicate with either trainee over one of the
two ARC-186 (VHF) or over the ARC-164 (UHF), provided the sets are operational. A
radio set is operational if the set and either ICS COMM box are powered up.
(b) The instructor initiates a call to a trainee by depressing the XMIT
(VHF, UHF) switchlight associated with the desired communications set.
( c ) If the set is operational, the switchlight is lit, and the instructor
mic audio is gated to the proper simulated radio receiver. Actuation of the
instructor push-to-talk transmit switch is required.
(d) A trainee initiates a call on the desired set by configuring the cockpit
set and COMM box properly and keying the press-to-talk switch.
( e ) If the set is operational, the associated switchlight on both IOS COMM
panels flash. Trainee-to-instructor call audio is always enabled.
(f) The flashing light is terminated by:
1 The trainee releasing the press-to-talk switch.
2 Either instructor pressing the flashing XMIT (PILOT VHF or CPG VHF,
PILOT UHF or CPG UHF) switchlight.