-
Set the INT/RAD selector switch to the center position.

 -
Push the VHF1 transmission pushbutton switch.

-
Push the VHF1 reception
pushbutton switch.

10. At each crew station, on the ACP:
 -Push the INT reception
pushbutton switch.

11. On the RMP1:
 -Set the ON/OFF selector switch to OFF.
-
The green bars on the VHF1transmission pushbutton switch come on.

-
The reception pushbutton switch movesfully out and comes on.

At the station where you do themaintenance:
-
Make sure that you receive the VHF1 station and the interphone at the same time.

 At the other crew station:

 -
Make sure that you can hear the communications only from the station where you do the maintenance.

-The green bars on the VHF1transmission pushbutton switch go off.
-
This pushbutton switch moves in (tothe initial position) and the annunciator light goes off.

-
This pushbutton switch moves in (tothe initial position) and the annunciator light goes off.

 1EFF : ALL 1 23-51-00Page 506 1 1 Feb 01/98 1 1 1CES 1 Subtask 23-51-00-710-053

 B. Do the operational test:
 NOTE : This procedure is applicable for all the crew stations.

____
 -------------------------------------------------------------------------------ACTION RESULT -------------------------------------------------------------------------------
1. At each crew station, on the ACP:
 -
Push the INT transmission
pushbutton switch.

-
Push and release the INT reception pushbutton switch.

2. At the station where you do the maintenance:
-Push the PTT switch of the hand microphone and speak in the microphone.
 3. On the ACP of the station where you do the maintenance:
 -Smoothly turn the INT reception pushbutton switch clockwise.
-
The green bars on the INTtransmission pushbutton switch come on.

-
The reception pushbutton switch movesfully out and comes on.

At the Captain's and First Officer'sstations:
-
Make sure that the loudspeakersoperate.

 At each crew station:

 -
Make sure that the reception in the headset is correct.

 At the ground mechanic's station:

 -
Make sure that the reception in the boomset is correct.

-The reception you can hear mustchange smoothly without interference in the headset. NOTE: During the test at the CAPT and F/O stations, the volume in the related loudspeakers also changes smoothly without interference.
 1EFF : ALL 1 23-51-00Page 507 1 1 Feb 01/98 1 1 1CES 1

 -------------------------------------------------------------------------------
ACTION RESULT -------------------------------------------------------------------------------
4. At the crew station under maintenance:
 -Release the PTT switch of the
 hand microphone.

 5. Close-up
________ Subtask 23-51-00-860-051
 A. Put the aircraft back to its initial configuration.
 (1)
 At each crew station, on the ACP, push the INT transmission and reception pushbutton switches.

 (2)
 Disconnect the microphone and the headset for all the crew stations.

 (3)
 Disconnect the boomset on the panel 108VU.

 (4)
 De-energize the aircraft electrical circuits
 (Ref. TASK 24-41-00-862-002).

 1EFF : ALL 1 23-51-00Page 508 1 1 Feb 01/98 1 1 1CES 1

 TASK 23-51-00-710-002 Operational Test of the SELCAL System WARNING : MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE
_______ YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT.
 NOTE : During this test, the aircraft must be in an open area.
____
 1.
 Reason for the Job

__________________
 To do a check of the operation of the SELCAL code panel.

 2.
 Job Set-up Information

______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific  boomset
 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-41-00-861-002  Energize the Aircraft Electrical Circuits from the External Power 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External Power
　
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