Operational Test of the CAPT and F/O ACPs Switching to the 3rd OCCUPANT ACP

TASK 23-51-00-710-003-A
Operational Test of the CAPT and F/O ACPs Switching to the 3rd OCCUPANT ACP

WARNING: MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT. UNWANTED ELECTRICAL POWER CAN BE DANGEROUS.

NOTE: You can do this test in the hangar.

ZONE: 211
ZONE: 212

1. Reason for the Job
Refer to the MPD TASK: 235100-01
OPERATIONAL CHECK OF CAPT. AND F/O AUDIO CONTROL PANELS SWITCHING TO THIRD AUDIO CONTROL PANEL
To make sure that the 3rd Occupant station operates correctly in the standby mode for the Captain and First Officer stations. For this, use the AUDIO SWITCHING selector switch (panel 48VU).
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	BOOMSET 600 OHMS
No specific	1	MICROPHONE 150 OHMS - HAND

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
211	COCKPIT
212	COCKPIT

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 31-60-00-860-001-A	EIS Start Procedure

3. Job Set-up
Subtask 23-51-00-860-054-A

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(2) On the ACPs of the Captain, the First Officer and the 3rd Occupant stations, make sure that:

The RAD/INT selector switch is in the middle position,
All transmission pushbutton switches are fully out.
All reception pushbutton switches are pushed (no reception).

(3) On the maintenance panel 50VU, make sure that the SVCE INT OVRD pushbutton switch is not pushed.
(4) On the overhead control and indicating panel 48VU, make sure that the AUDIO SWITCHING selector switch is in the NORM position.
(5) On the panels 301VU and 500VU, set the LOUD SPEAKER potentiometers to MAX.
(6) At the Captain and First Officer Occupant stations:

Connect a BOOMSET 600 OHMS to the jack panel.

(7) At the Captain and First Officer stations, connect a MICROPHONE 150 OHMS - HAND to the HAND MIC receptacle.
(8) Do the EIS start procedure (upper ECAM only) (Ref. AMM TASK 31-60-00-860-001).

Subtask 23-51-00-865-052-A

B. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	COM/AUDIO/ACP/F/O	5RN	G07
** ON A/C NOT FOR ALL
49VU	COM/AUDIO/FLT/INTPH	9RN	G08
49VU	COM/AUDIO/ACP/CAPT	4RN	G06
** ON A/C ALL
49VU	CAPT/LOUD/SPKR	5WW	F10
** ON A/C NOT FOR ALL
49VU	COM/ACP F/O/BITE/ INT 2 AUDIO/3&5 OCCPNT	5RN	G07
** ON A/C NOT FOR ALL
49VU	COM/INT/1+2	9RN	G08
49VU	COM/ACP CAPT/SELCAL/INT 1 AUDIO/AVNCS	4RN	G06
** ON A/C ALL
121VU	COM NAV/ACP/THIRD/OCCPNT	6RN	M02
121VU	EIS/F/O/LOUD/SPKR	4WW	P08

4. Procedure
Subtask 23-51-00-710-055-A ** ON A/C NOT FOR ALL

A. Operational test

NOTE: This procedure is applicable for the Captain Station. It is the same for the First Officer station. Refer to the data between parentheses.

ACTION	RESULT
1.On the ACP of the Captain (First Officer) and the 3rd Occupant:
Push the INT transmission pushbutton switch.	The green bars on the INT transmission pushbutton switch come on.
Push and release the INT reception pushbutton switch and then turn it to the middle position.	The reception pushbutton switch moves fully out and comes on.
2.On the overhead control and indicating panel 48VU:	On the upper ECAM DU.
Set the AUDIO SWITCHING selector switch to CAPT 3 (F/O 3).	The AUDIO 3XFRD indication comes into view in green. NOTE: To get the MEMO, push the CLR pushbutton switch on the ECAM control panel until the indication comes into view.
3.On the CAPT (F/O) station:
Speak into the microphone.	Make sure that what is said in the microphone is clearly audible: .In the boomset of the Captain (First Officer). .In the loudspeaker of the Captain (First Officer).
4.On the 3rd Occupant's ACP:
Push the INT transmission pushbutton switch.	The green bars on the INT transmission pushbutton switch go off.
5.On the CAPT (F/O) station:
Speak into the microphone.	Make sure that the reception stops: .In the boomset of the Captain (First Officer). .In the loudspeaker of the Captain (First Officer).
6.On the 3rd Occupant's ACP:
Push the INT transmission pushbutton switch.	The green bars on the INT transmission pushbutton switch come on.
Smoothly turn clockwise the INT pushbutton switch for reception and speak into the CAPT (F/O) microphone.	Make sure that the reception volume changes smoothly and that there is no interference: .In the boomset of the Captain (First Officer). .In the loudspeaker of the Captain (First Officer).
7.On the CAPT (F/O) ACP:
Smoothly turn clockwise the INT pushbutton switch for reception and speak into the microphone.	Make sure that the reception volume does not change: .In the boomset of the Captain (First Officer). .In the loudspeaker of the Captain (First Officer).
8.On the CAPT (F/O) station:
On the ACP, set the INT/RAD switch to RAD and hold it in this position.
Speak into the boomset microphone.	Make sure that the reception stops: .In the boomset of the Captain (First Officer). .In the loudspeaker of the Captain (First Officer).
Release the RAD/INT switch.	The RAD/INT switch moves to the middle position.
On the CAPT (F/O) side stick controller push the PTT switch.
Speak into the boomset microphone.	Make sure that what is said in the microphone is clearly audible: .In the boomset of the Captain (First Officer). .In the loudspeaker of the Captain (First Officer).
Release the PTT switch on the CAPT (F/O) side stick controller.
9.On the 3rd Occupant's ACP:
Set the RAD/INT switch to RAD and hold it in this position.
Speak into the microphone of the CAPT (F/O) boomset.	Make sure that what is said in the microphone is clearly audible: .In the boomset of the Captain (First Officer). .In the loudspeaker of the Captain (First Officer).
Release the RAD/INT switch.	the RAD/INT switch moves to the middle position.
10.On the overhead control and indicating panel 48VU:
Set the AUDIO SWITCHING selector switch to NORM.

Subtask 23-51-00-710-055-D ** ON A/C NOT FOR ALL

A. Operational test

NOTE: This procedure is applicable for the Captain Station. It is the same for the First Officer station. Refer to the data in parentheses.

ACTION	RESULT
1.On the ACP of the Captain (First Officer) and the 3rd Occupant:
Push the INT transmission pushbutton switch.	The green bars on the INT transmission pushbutton switch come on.
Push and release the INT reception pushbutton switch and then turn it to the middle position.	The reception pushbutton switch moves fully out and comes on.
2.On the overhead control and indicating panel 48VU:	On the upper ECAM DU:
Set the AUDIO SWITCHING selector switch to CAPT 3 (F/O 3).	The AUDIO 3XFRD indication comes into view in green. NOTE: To get the MEMO, push the CLR pushbutton switch on the ECAM control panel until the indication comes into view.
	On the ACP of the Captain (F/O): The green bars on the INT transmission pushbutton switch go off.
3.At the CAPT (F/O) station:
push the PTT switch on the microphone and at the same time, speak into it.	Make sure that what is said in the microphone is clearly audible: .In the boomset of the Captain (First Officer). .In the loudspeaker of the Captain (First Officer).
4.On the 3rd Occupant's ACP:
Push the INT transmission pushbutton switch.	The green bars on the INT transmission pushbutton switch go off.
5.At the CAPT (F/O) station:
Speak into the microphone.	Make sure that the reception stops: .In the boomset of the Captain (First Officer). .In the loudspeaker of the Captain (First Officer).
6.On the 3rd Occupant's ACP:
Push the INT transmission pushbutton switch.	The green bars on the INT transmission pushbutton switch come on.
Smoothly turn clockwise the INT pushbutton switch for reception and speak into the CAPT (F/O) microphone.	Make sure that the reception volume changes smoothly and that there is no interference: .In the boomset of the Captain (First Officer). .In the loudspeaker of the Captain (First Officer).
7.At the CAPT (F/O) station:
On the ACP, set the INT/RAD switch to RAD and hold it in this position.
Speak into the boomset microphone.	Make sure that the reception stops: .In the boomset of the Captain (First Officer). .In the loudspeaker of the Captain (First Officer).
Release the RAD/INT switch.	The RAD/INT switch moves to the middle position.
On the CAPT (F/O) side stick controller, push the PTT switch.
Speak into the boomset microphone.	Make sure that what is said in the microphone is clearly audible: .In the boomset of the Captain (First Officer). .In the loudspeaker of the Captain (First Officer).
Release the PTT switch on the CAPT (F/O) side stick controller.
8.On the 3rd Occupant's ACP:
Set the RAD/INT switch to RAD and hold it in this position.
Speak into the microphone of the CAPT (F/O) boomset.	Make sure that what is said in the microphone is clearly audible: .In the boomset of the Captain (First Officer). .In the loudspeaker of the Captain (First Officer).
Release the RAD/INT switch.	The RAD/INT switch moves to the middle position.
9.On the overhead control and indicating panel 48VU:
Set the AUDIO SWITCHING selector switch to NORM.

5. Close-up
Subtask 23-51-00-860-055-A

A. Put the aircraft back to its initial configuration.
(1) On the ACPs, push the INT transmission and reception pushbutton switches.
(2) On the ECAM control panel, set the UPPER DISPLAY potentiometer to OFF.
(3) At the Captain and First Officer stations, disconnect the microphone and the boomset.
(4) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

[Rev.10 from 2021] 2026.04.02 06:12:16 UTC