COMMUNICATIONS, VHF COM
Operation
Aircraft Operations Manual
4/3.2
KO
PAGE
4
Jun 01/18
KING MEMORY
3.
ABNORMAL OPERATION
CONDITIONS
ABNORMAL PROCEDURES
3.1
LOSS OF COM-
MUNICATION
ACTIONS
1.
Headsets
CHECK
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
−
Check for faulty headset by connecting them one at a time.
2.
PTT button
CHECK.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
−
A faulty PTT button can block the system but the COMs can never transmit
longer than 2 min. when transmission will be shut off automatically.
Communication still lost
3. NORM/EMER switch
EMER
. . . . . . . . . . . . . . . . . . . . . . . .
−
COM 1, L audio control panel.
−
COM 2, R audio control panel.
Communication re
−
established
4. The audio control panel failed.
−
Only the COM can be used with switch in EMER. All other functions
must be controlled by the opposite audio control panel.
−
The COM audio level becomes fixed and is not adjustable.
−
The PTT function can only be provided from the PTT button on the con-
trol wheel.
L ACP:
COM 1
−
L control wheel.
R ACP:
COM 2
−
R control wheel.
5. End of procedure.
Communication still lost
4. Communication lost.
5. End of procedure.
Communication re
−
established
3.
If headsets failed use handmicrophones and loudspeakers.
4.
End of procedure.
3.2
VHF DEAD
ACTIONS
1.
CBs, E
−
13 (COM 1), L
−
12 (COM 2)
CHECK/RESET
. . . . . . . . . . . . . . .
2.
End of procedure.