Operational Test of the Passenger Address (PA) system

TASK 23-73-00-710-022-A
Operational Test of the Passenger Address (PA) system

1. Reason for the Job
This procedure gives the instructions necessary to make sure that the PA system operates correctly.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	BOOMSET 600 OHMS
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Referenced Information

REFERENCE	DESIGNATION
TASK 23-73-00-861-001-A	Energize the Cabin Intercommunication Data System (CIDS)
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 35-23-00-710-001-A	Operational Check of Manual Mask Release

3. Job Set-up
Subtask 23-73-00-860-117-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) Make sure that the Cabin Intercommunication Data System (CIDS) is energized
(Ref. AMM TASK 23-73-00-861-001).
(3) Energize the Passenger Emergency-Oxygen System
(Ref. AMM TASK 35-23-00-710-001).
(4) Make sure that the INT/RAD switch on the Audio Control Panel (ACP) is in the center position.
(5) Make sure that the INTEG LT/MAIN PNL&PED rotary knob on the pedestal panel 111VU is in the BRT position.
(6) Connect a BOOMSET 600 OHMS to the captain jack panel 61VU.
(7) Make sure that the cockpit door is open.
(8) On all emergency oxygen-containers, set the doorstop to the test position.

NOTE: The annunciation indication and the communication go off, if there is a delay of more than 60 sec. between the test procedure steps.

Subtask 23-73-00-865-125-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	ENGINE/2/FADEC A/AND EIU 2	2KS2	A05
49VU	ENGINE/1/FADEC A/AND EIU 1	2KS1	A04
** ON A/C NOT FOR ALL
121VU	ENGINE/ENG2/FADEC B/AND EIU2	4KS2	Q40
** ON A/C NOT FOR ALL
121VU	ENGINE/ENG1/FADEC B/AND EIU 1	4KS1	R41
** ON A/C NOT FOR ALL
121VU	ENGINE/ENG2/FADEC B/AND EIU2	4KS2	R41
121VU	ENGINE/ENG1/FADEC B/AND EIU 1	4KS1	R40
** ON A/C NOT FOR ALL
121VU	ENGINE/ENG2/FADEC B	4KS2	Q40

Subtask 23-73-00-865-266-A ** ON A/C NOT FOR ALL

C. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	ENGINE/1 AND 2/IGN/SYS A	1JH	A03
121VU	ENGINE/IGN/ENG2/SYS B	3JH2	P42
121VU	ENGINE/IGN/ENG1/SYS B	3JH1	P41
** ON A/C NOT FOR ALL
121VU	ENGINE/IGN/ENG2/SYS A BAT	2JH2	P40
121VU	ENGINE/IGN/ENG1/SYS A BAT	2JH1	P39

4. Procedure
Subtask 23-73-00-710-241-B ** ON A/C NOT FOR ALL

A. Test of PA announcement from the cockpit.

ACTION	RESULT
1.On the Main Instrument Panel 301VU:
turn the LOUDSPEAKER rotary knob fully cw.
2.On the CAPT Audio Selector Panel:	On the CAPT Audio Selector Panel:
push and turn the PA rotary knob fully cw.	the integral light of the PA rotary knob comes on.
push and hold the PA pushbutton switch.	the integral light of the PA pushbutton switch comes on.
3.In the cockpit on the hand microphone:	In the cockpit, the cabin, all lavatories and all ATTND Stations:
push the PTT and do an announcement.	a LO-HI-LO tone is heard through the loudspeakers.
	the announcement is heard through the loudspeakers.
	On all Attendant Indication Panels (AIP) 320RH and 322RH:
	the message PA ALL IN USE comes on.
release the PA pushbutton switch.	the message PA ALL IN USE goes off.
	On the CAPT Audio Selector Panel:
	the integral light of the PA pushbutton switch goes off.
4.In the cockpit:	On all AIPs 320RH and 322RH:
remove the handset from the cradle.
push the PTT and do an announcement.	the message PA ALL IN USE comes on.
	In the cabin, all lavatories and all ATTND Stations:
	a LO-HI-LO tone is heard through the loudspeakers.
	the announcement is heard through the loudspeakers.
	On all AIPs 320RH and 322RH:
put the handset back into its cradle.	the message PA ALL IN USE goes off.
5.On the CAPT Audio Selector Panel:	On the CAPT Audio Selector Panel:
push to reset and turn the PA rotary knob fully ccw.	the integral light of the PA rotary knob goes off.
6.On the Main Instrument Panel 301VU:
turn the LOUDSPEAKER rotary knob fully ccw.

Subtask 23-73-00-710-241-C ** ON A/C NOT FOR ALL

A. Do the test of the PA announcement from the cockpit

ACTION	RESULT
1.In the cockpit:
Open the cockpit door.
2.In the cockpit, on the main instrument panel 301VU:
Turn the LOUDSPEAKER rotary knob fully cw.
3.On the audio control panel in the cockpit:	On the audio control panel in the cockpit:
Push and turn the PA rotary knob fully cw.	The integral light of the PA rotary knob comes on.
Push and hold the PA pushbutton switch.	The integral light of the PA pushbutton switch comes on.
	On all Attendant Indication Panels (AIPs) 320RH/322RH:
	The message DIRECT PA IN USE comes on.
	In the cabin, in all lavatories and at all attendant stations:
	You hear a LO-HI-LO chime.
4.On the cockpit boomset:	In the cabin, in all lavatories and at all attendant stations:
Make an announcement.	You hear the announcement.
5.On the audio control panel in the cockpit:	On all AIPs 320RH/322RH:
Push to release the PA pushbutton switch.	The message DIRECT PA IN USE goes off.
	In the cabin, in all lavatories and at all attendant stations:
	The announcement stops.
	On the audio control panel in the cockpit:
	The integral light of the PA pushbutton switch goes off.
Push to reset and turn the PA rotary knob fully ccw.	The integral light of the PA rotary knob goes off.
6.In the cockpit:
Lift the handset from the cradle.
Push the PA ALL pushbutton switch.
	On all AIPs:
Push and hold the PTT switch.	The message DIRECT PA IN USE comes on.
	In the cabin, in all lavatories and at all attendant stations:
	You hear a LO-HI-LO chime.
Make an announcement.	You hear the announcement.
Release the PTT switch.	The message DIRECT PA IN USE goes off.
	In the cabin, in all lavatories and at all attendant stations:
	The announcement stops.
7.On the keyboard of the cockpit handset:
Push the RESET pushbutton.
8.Repeat the steps 6 thru 7 for all applicable PA functions for the handset of the cockpit.	The indications of the AIPs and the announcements are the same as by steps 6 thru 7.
9.In the cockpit:
Put the handset back into its cradle.
10.In the cockpit, on the main instrument panel 301VU:
Turn the LOUDSPEAKER rotary knob fully ccw.

Subtask 23-73-00-710-241-D ** ON A/C NOT FOR ALL

A. Test of the PA Announcement from the Cockpit

ACTION	RESULT
1.In the cockpit:
Open the cockpit door.
2.In the cockpit, on main instrument panel 301VU:
Turn the LOUDSPEAKER rotary knob fully cw.
3.On the audio control panel in the cockpit:	On the audio control panel in the cockpit:
Push and turn the PA rotary knob fully cw.	The integral light of the PA rotary knob comes on.
Push and hold the PA pushbutton switch.	The integral light of the PA pushbutton switch comes on.
	On all Attendant Indication Panels (AIPs):
	The message 'DIRECT PA IN USE' comes on.
4.On the cockpit boomset:	In the cabin, in all lavatories and at all attendant stations:
Make an announcement.	You hear the announcement.

5.On the audio control panel in the cockpit:	On all AIPs:
Push to release the PA pushbutton switch.	The message 'DIRECT PA IN USE' goes off.
	In the cabin, in all lavatories and at all attendant stations:
	The announcement stops.
	On the audio control panel in the cockpit:
	The integral light of the PA pushbutton switch goes off.

Push to reset and turn the PA rotary knob fully ccw.	The integral light of the PA rotary knob goes off.

6.In the cockpit:
Lift the handset from the cradle.
	On all AIPs:
Push and hold the PTT switch.	The message 'DIRECT PA IN USE' comes on.
	In the cabin, in all lavatories and at all attendant stations:
Make an announcement.	You hear the announcement.

Release the PTT switch.	The message 'DIRECT PA IN USE' goes off.
	In the cabin, in all lavatories and at all attendant stations:
	The announcement stops.

7.In the cockpit:
Put the handset back into its cradle.
8.In the cockpit, on main instrument panel 301VU:
Turn the LOUDSPEAKER rotary knob fully ccw.

Subtask 23-73-00-710-241-K ** ON A/C NOT FOR ALL

A. Do the test of the PA announcement from the cockpit

ACTION	RESULT
1.In the cockpit:
Open the cockpit door.
2.In the cockpit, on the main instrument panel 301VU:
Turn the LOUDSPEAKER rotary knob fully cw.
3.On the audio control panel in the cockpit:	On the audio control panel in the cockpit:
Push and turn the PA rotary knob fully cw.	The integral light of the PA rotary knob comes on.
Push and hold the PA pushbutton switch.	The integral light of the PA pushbutton switch comes on.
	On all Attendant Indication Panels (AIPs) 320RH/322RH:
	The message DIRECT PA IN USE comes on.
	On the overhead panel 27VU in the cockpit:
	The message PA IN USE comes on.
4.On the cockpit boomset:	In the cabin, in all lavatories and at all attendant stations:
Make an announcement.	You hear the announcement.
5.On the audio control panel in the cockpit:	On all AIPs 320RH/322RH:
Push to release the PA pushbutton switch.	The message DIRECT PA IN USE goes off.
	In the cabin, in all lavatories and at all attendant stations:
	The announcement stops.
	On the overhead panel 27VU in the cockpit:
	The message PA IN USE goes off.
	On the audio control panel in the cockpit:
	The integral light of the PA pushbutton switch goes off.
Push to reset and turn the PA rotary knob fully ccw.	The integral light of the PA rotary knob goes off.
6.In the cockpit:
Lift the handset from the cradle.
	On all AIPs:
Push and hold the PTT switch.	The message DIRECT PA IN USE comes on.
	In the cabin, in all lavatories and at all attendant stations:
Make an announcement.	You hear the announcement.
	On all AIPs:
Release the PTT switch.	The message DIRECT PA IN USE goes off.
	In the cabin, in all lavatories and at all attendant stations:
	The announcement stops.
7.In the cockpit:
Put the handset back into its cradle.
8.In the cockpit, on the main instrument panel 301VU:
Turn the LOUDSPEAKER rotary knob fully ccw.

Subtask 23-73-00-710-242-A ** ON A/C NOT FOR ALL

B. Test of PA announcement from the cabin.

ACTION	RESULT
1.On the Main Instrument Panel 301VU:
turn the LOUDSPEAKER rotary knob fully cw.
2.On the CAPT Audio Selector Panel:	On the CAPT Audio Selector Panel:
push and turn the PA rotary knob fully cw.	the integral light in the PA rotary knob comes on.
3.At the FWD ATTND Station:	On the handset:
remove the handset from the cradle.	a dial tone is heard.

	On the FWD AIP 320RH:
	'#' comes on.
push and hold the PTT and do an announcement.	'#' goes off.
	the message PA ALL comes on.
	On the MID, EXIT and AFT AIPs 320RH and 322RH:
	the PA ALL IN USE message comes on.
	On the handset:
	the dial tone is off.
	In the cabin, all the lavatories, the MID, EXIT and AFT ATTND stations:
	a LO-HI-LO tone is heard through the loudspeakers.
	the announcement is heard through the loudspeakers.
	In the cockpit:
	the announcement is heard through the handset and the loudspeaker.
put the handset back into its cradle.	All indications are cancelled.
	On the handset:
remove the handset from the cradle.	a dial tone is heard.
	On the FWD AIP 320RH:
	'#' comes on.
push the PA pushbutton switch.	'##' comes on.
	On the handset:
	the dial tone stops.
	On the FWD AIP 320RH:
push the ALL pushbutton switch.	'##' goes off.
	the message PA ALL comes on.
	At the AFT AIP 320RH and the MID and EXIT AIPs 322RH:
	the message PA ALL IN USE comes on.
	In the cabin, all lavatories, the MID, EXIT and the AFT ATTND stations:
push the PTT and do an announcement.	a LO-HI-LO tone is heard through the loudspeakers.
	the announcement is heard through the loudspeakers.
	In the cockpit:
	the announcement is heard through the handset and the loudspeaker.
push the RESET pusbutton switch.	On the FWD AIP 320RH: '#' comes on.
put the handset back into its cradle.	All indications are cancelled.
4.At the MID ATTND Station:	On the handset:
remove the handset from the cradle.	a dial tone is heard.
	On the MID AIP 322RH:
	'#' comes on.
push and hold the PTT and do an announcement.	'#' goes off.
	the message PA ALL comes on.
	On the FWD, EXIT and AFT AIPs 320RH and 322RH:
	the message PA ALL IN USE comes on.
	On the handset:
	the dial tone stops.
	In the cabin, all lavatories, the FWD, EXIT and AFT ATTND stations:
	a LO-HI-LO tone is heard through the loudspeakers.
	the announcement is heard through the loudspeakers.
push the RESET pusbutton switch.	On the FWD AIP 320RH: '#' comes on.
put the handset back into its cradle.	All indications are cancelled.
remove the handset from the cradle.	On the handset:
	a dial tone is heard.
	On the MID AIP 322RH:
	'#' comes on.
push the PA pushbutton switch.	'##' comes on.
	On the handset:
	the dial tone stops.
	On the MID AIP 322RH:
push the ALL pushbutton switch.	'##' goes off.
	the message PA ALL comes on.
	On the FWD and AFT AIPs 320RH and the EXIT AIP 322RH:
	the message PA ALL IN USE comes on.
	In the cabin, all lavatories, the FWD, EXIT and the AFT ATTND Stations:
push the PTT and do an announcement.	a LO-HI-LO tone is heard through the loudspeakers.
	the announcement is heard through the loudspeakers.
	In the cockpit:
	the announcement is heard through the handset and the loudspeaker.
push the RESET pusbutton switch.	On the FWD AIP 320RH: '#' comes on.
put the handset back into its cradle.	All indications are cancelled.
5.At the AFT ATTND station:	On the handset:
remove the handset from the cradle.	a dial tone is heard.
	On the AFT AIP 320RH:
	'#' comes on.
push and hold the PTT and do an announcement.	'#' goes off.
	the message PA ALL comes on.
	On the FWD, EXIT and AFT AIPs 320RH and 322RH:
	the message PA ALL IN USE comes on.
	On the handset:
	the dial tone stops.
	In the cabin, all the lavatories, the FWD, MID and EXIT ATTND stations:
	a LO-HI-LO tone is heard through the loudspeakers.
	the announcement is heard through the loudspeakers.
put the handset back into its cradle.	All indications are cancelled.
	On the handset:
remove the handset from the cradle.	a dial tone is heard.
	On the AFT AIP 320RH:
	'#' comes on.
push the PA pushbutton switch.	'##' comes on.
	On the handset:
	the dial tone stops.
	On the AFT AIP 320RH:
push the ALL pushbutton switch.	'##' goes off.
	the message PA ALL comes on.
	On the FWD, MID and EXIT AIPs 320RH and 322RH:
	the message PA ALL IN USE comes on.
	In the cabin, all lavatories, the FWD and MID ATTND stations:
push the PTT and do an announcement.	a LO-HI-LO tone is heard through the loudspeakers.
	the announcement is heard through the loudspeakers.
	In the cockpit:
	the announcement is heard through the handset and the loudspeaker.
put the handset back into its cradle.	All indications are cancelled.
6.On the CAPT Audio Selector Panel:	On the CAPT Audio Selector Panel:
push to reset and turn the PA rotary knob fully ccw.	the integral light in the PA rotary knob goes off.
7.On the Main Instrument Panel 301VU:
turn the LOUDSPEAKER rotary knob fully ccw.

Subtask 23-73-00-710-242-O ** ON A/C NOT FOR ALL

B. Test of PA announcement from the cabin.

ACTION	RESULT
1.On the Main Instrument Panel 301VU:
turn the LOUDSPEAKER rotary knob fully cw.
2.On the CAPT Audio Selector Panel:	On the CAPT Audio Selector Panel:
push and turn the PA rotary knob fully cw.	the integral light in the PA rotary knob comes on.
3.At the forward attendant station:	On the handset:
remove the handset from the cradle.	you hear a dial tone.

	On the forward AIP 320RH:
	the number symbol flashes.
push and hold the PTT and make an announcement.	the number symbol goes off.
	the message > DIRECT PA comes on.
	On the aft AIP 320RH and the mid and exit AIPs 322RH:
	the DIRECT PA IN USE message comes on.
	On the handset:
	the dial tone is off.
	In the cabin, all the lavatories, the mid, exit and aft attendant stations:
	you hear the announcement.
	In the cockpit:
	you hear the announcement.
put the handset back into its cradle.	All indications go off.
	On the handset:
remove the handset from the cradle.	you hear a dial tone.
	On the forward AIP 320RH:
	the number symbol flashes.
push the PA pushbutton switch.	On the handset:
	the dial tone stops.
	On the forward AIP 320RH:
	the number symbol goes off.
	the message PA ALL comes on.

push and hold the PTT and make an announcement.	On the forward AIP 320RH:
	the message > PA ALL shows.
	At the aft left and right AIPs 320RH and the mid and exit AIPs 322RH:
	the message PA ALL IN USE comes on.
	In the cabin, all lavatories, the mid, exit and the aft attendant stations:
	you hear the announcement.
	In the cockpit:
	you hear the announcement.
put the handset back into its cradle.	All indications go off.
4.At the mid attendant Station:	On the handset:
remove the handset from the cradle.	you hear a dial tone.
	On the mid AIP 322RH:
	the number symbol flashes.
push and hold the PTT and make an announcement.	the number symbol goes off.
	the message > DIRECT PA comes on.
	On the forward and aft AIPs 320RH and the exit AIP 322RH:
	the message DIRECT PA IN USE comes on.
	On the handset:
	the dial tone stops.
	In the cabin, all lavatories, the forward, exit and aft attendant stations:
	you hear the announcement.
put the handset back into its cradle.	All indications go off.
remove the handset from the cradle.	On the handset:
	you hear a dial tone.
	On the mid AIP 322RH:
	the number symbol flashes.
push the PA pushbutton switch.	On the handset:
	the dial tone stops.
	On the mid AIP 322RH:
	the number symbol goes off.
	the message PA ALL comes on.
push and hold the PTT and make an announcement.	On the mid AIP 322RH:
	the message > PA ALL comes on.
	On the forward and aft AIPs 320RH and the exit AIP 322RH:
	the message PA ALL IN USE comes on.
	In the cabin, all lavatories, the forward, exit and the aft attendant stations:
	you hear the announcement.
	In the cockpit:
	you hear the announcement.
put the handset back into its cradle.	All indications go off.
5.At the exit attendant station:	On the handset:
remove the handset from the cradle.	you hear a dial tone.
	On the exit AIP 322RH:
	the number symbol flashes.
push and hold the PTT and make an announcement.	the number symbol goes off.
	the message > DIRECT PA comes on.
	On the forward and aft AIPs 320RH and the mid AIP 322RH:
	the message DIRECT PA IN USE comes on.
	On the handset:
	the dial stops.
	In the cabin, all the lavatories, the forward and mid attendant stations:
	you hear the announcement.

put the handset back into its cradle.	All indications go off.
	On the handset:
remove the handset from the cradle.	you hear a dial tone.
	On the exit AIP 322RH:
	the number symbol flashes.
push the PA pushbutton switch.	On the handset:
	the dial tone stops:
	On the exit AIP 322RH:
	the number symbol goes off.
	the message PA ALL comes on.
push and hold the PTT and make an announcement.
	On the exit AIP 322RH:
	the message > PA ALL comes on.
	On the forward and aft AIPs 320RH and the mid AIP 322RH:
	the message PA ALL IN USE comes on.
	In the cabin, all lavatories, the forward and mid attendant stations:
	you hear the announcement.
	In the cockpit:
	you hear the announcement.
put the handset back into its cradle.	All indications go off.
6.At the aft left attendant station:	On the handset:
remove the handset from the cradle.	you hear a dial tone.
	On the aft left AIP 320RH:
	the number symbol flashes.
push and hold the PTT and make an announcement.	the number symbol goes off.
	the message > DIRECT PA comes on.
	On the forward and aft right AIPs 320RH, the mid and exit AIPs 322RH:
	the message DIRECT PA IN USE comes on.
	On the handset:
	the dial tone stops.
	In the cabin, all the lavatories, the forward and mid attendant stations:
	you hear the announcement.
put the handset back into its cradle.	All indications go off.
	On the handset:
remove the handset from the cradle.	you hear a dial tone.
	On the aft left AIP 320RH:
	the number symbol flashes.
push the PA pushbutton switch.	On the handset:
	the dial tone stops.
	On the aft left AIP 320RH:
	the number symbol goes off.
	the message PA ALL comes on.

push and hold the PTT and make an announcement.	On the aft left AIP 320RH:
	the message > PA ALL comes on.
	On the forward and aft right AIPs 320RH, the mid and exit AIPs 322RH:
	the message PA ALL IN USE comes on.
	In the cabin, all lavatories, the forward and mid attendant stations:
	you hear the announcement.
	In the cockpit:
	you hear the announcement.
put the handset back into its cradle.	All indications go off.
7.At the aft right attendant station:	On the handset:
remove the handset from the cradle.	you hear a dial tone.
	On the aft right AIP 320RH:
	the number symbol flashes.
push and hold the PTT and make an announcement.	the number symbol goes off.
	the message > DIRECT PA comes on.
	On the forward and aft left AIPs 320RH, the mid and exit AIPs 322RH:
	the message DIRECT PA IN USE comes on.
	On the handset:
	the dial tone stops.
	In the cabin, all the lavatories, the forward and mid attendant stations:
	you hear the announcement.
put the handset back into its cradle.	All indications go off.
	On the handset:
remove the handset from the cradle.	you hear a dial tone.
	On the aft right AIP 320RH:
	the number symbol flashes.
push the PA pushbutton switch.	On the handset:
	the dial tone stops:
	On the aft right AIP 320RH:
	the number symbol goes off.
	the message PA ALL comes on.

push and hold the PTT and make an announcement.	On the aft right AIP 320RH:
	the message > PA ALL comes on.
	On the forward and aft left AIPs 320RH, the mid and exit AIPs 322RH:
	the message PA ALL IN USE comes on.
	In the cabin, all lavatories, the forward and mid attendant stations:
	you hear the announcement.
	In the cockpit:
	you hear the announcement.
put the handset back into its cradle.	All indications go off.
8.On the CAPT Audio Selector Panel:	On the CAPT Audio Selector Panel:
push to reset and turn the PA rotary knob fully ccw.	the integral light in the PA rotary knob goes off.
9.On the Main Instrument Panel 301VU:
turn the LOUDSPEAKER rotary knob fully ccw.

Subtask 23-73-00-710-242-Q ** ON A/C NOT FOR ALL

B. Test of PA announcement from the cabin.

ACTION	RESULT
1.On the Main Instrument Panel 301VU:
turn the LOUDSPEAKER rotary knob fully cw.
2.On the CAPT Audio Selector Panel:	On the CAPT Audio Selector Panel:
push and turn the PA rotary knob fully cw.	the integral light in the PA rotary knob comes on.
3.At the forward attendant Station:	On the handset:
remove the handset from the cradle.	you hear a dial tone.

	On the forward AIP 320RH:
	the number symbol flashes.
push and hold the PTT and make an announcement.	the number symbol goes off.
	the message DIRECT PA comes on.
	On the aft AIP 320RH, the mid and exit AIPs 322RH:
	the DIRECT PA IN USE message comes on.
	On the handset:
	the dial tone is off.
	In the cabin, all the lavatories, the mid, exit and aft attendant stations:
	you hear a LO-HI-LO tone.
	you hear the announcement.
	In the cockpit:
	you hear the announcement through the handset and the loudspeakers.
put the handset back into its cradle.	All indications go off.
	On the handset:
remove the handset from the cradle.	you hear a dial tone.
	On the forward AIP 320RH:
	the number symbol flashes.
push the PA pushbutton switch.	On the handset:
	the dial tone stops.
	On the forward AIP 320RH:
	the number symbol goes off.
	the message PA ALL comes on.
	At the aft AIP 320RH, the mid and exit AIPs 322RH:
	the message PA ALL IN USE comes on.
	In the cabin, all the lavatories, the mid, exit and the aft attendant stations:
push and hold the PTT and make an announcement.	you hear a LO-HI-LO tone.
	you hear the announcement.
	In the cockpit:
	you hear the announcement through the handset and the loudspeakers.
put the handset back into its cradle.	All indications go off.
4.At the mid attendant Station:	On the handset:
remove the handset from the cradle.	you hear a dial tone.
	On the mid AIP 322RH:
	the number symbol flashes.
push and hold the PTT and make an announcement.	the number symbol goes off.
	the message DIRECT PA comes on.
	On the forward and aft AIPs 320RH and the EXIT AIP 322RH:
	the message DIRECT PA IN USE comes on.
	On the handset:
	the dial tone stops.
	In the cabin, all the lavatories, the forward, exit and aft attendant stations:
	you hear a LO-HI-LO tone.
	you hear the announcement.
put the handset back into its cradle.	All indications go off.
remove the handset from the cradle.	On the handset:
	you hear a dial tone.
	On the mid AIP 322RH:
	the number symbol flashes.
push the PA pushbutton switch.	On the handset:
	the dial tone stops.
	On the mid AIP 322RH:
	the number symbol goes off.
	the message PA ALL comes on.
	On the forward and aft AIPs 320RH and the exit AIP 322RH:
	the message PA ALL IN USE comes on.
	In the cabin, all the lavatories, the forward, exit and the aft attendant stations:
push and hold the PTT and make an announcement.	you hear a LO-HI-LO tone.
	you hear the announcement.
	In the cockpit:
	you hear the announcement througt the handset and the loudspeakers.
put the handset back into its cradle.	All indications go off.
5.At the exit attendant station:	On the handset:
remove the handset from the cradle.	you hear a dial tone.
	On the exit AIP 322RH:
	the number symbol flashes.
push and hold the PTT and make an announcement.	the number symbol goes off.
	the message DIRECT PA comes on.
	On the forward and aft AIPs 320RH and the mid AIP 322RH:
	the message DIRECT PA IN USE comes on.
	On the handset:
	the dial stops.
	In the cabin, all the lavatories, the forward and mid attendant stations:
	you hear a LO-HI-LO tone.
	you hear the announcement.
	put the handset back into its cradle.
	All indications go off.
	In the handset:
remove the handset from the cradle.	you hear a dial tone.
	On the exit AIP 322RH:
	the number symbol flashes.
push the PA pushbutton switch.	On the handset:
	the dial tone stops:
	On the exit AIP 322RH:
	the number symbol goes off.
	the message PA ALL comes on.
	On the forward and aft AIPs 320RH and the mid AIP 322RH:
	the message PA ALL IN USE comes on.
	In the cabin, all the lavatories, the forward and mid attendant stations:
push and hold the PTT and make an announcement.	you hear a LO-HI-LO tone.
	you hear the announcement.
	In the cockpit:
	you hear the announcement through the handset and the loudspeakers.
put the handset back into its cradle.	All indications go off.
6.At the aft left attendant station:	On the handset:
remove the handset from the cradle.	you hear a dial tone.
	On the aft left AIP 320RH:
	the number symbol flashes.
push and hold the PTT and make an announcement.	the number symbol goes off.
	the message DIRECT PA comes on.
	On the forward and aft right AIPs 320RH, the mid and exit AIPs 322RH:
	the message DIRECT PA IN USE comes on.
	On the handset:
	the dial tone stops.
	In the cabin, all the lavatories, the forward and mid attendant stations:
	you hear a LO-HI-LO tone.
	you hear the announcement.
put the handset back into its cradle.	All indications go off.
	On the handset:
remove the handset from the cradle.	you hear a dial tone.
	On the aft left AIP 320RH:
	the number symbol flashes.
push the PA pushbutton switch.	On the handset:
	the dial tone stops.
	On the aft left AIP 320RH:
	the number symbol goes off.
	the message PA ALL comes on.
	On the forward and aft right AIPs 320RH, the mid and exit AIPs 322RH:
	the message PA ALL IN USE comes on.
	In the cabin, all the lavatories, the forward and mid attendant stations:
push and hold the PTT and make an announcement.	you hear a LO-HI-LO tone.
	you hear the announcement.
	In the cockpit:
	you hear the announcement through the handset and the loadspeakers.
put the handset back into its cradle.	All visual indications go off.
7.At the aft right attendant station:	On the handset:
remove the handset from the cradle.	you hear a dial tone.
	On the aft right AIP 320RH:
	the number symbol flashes.
push and hold the PTT and make an announcement.	the number symbol goes off.
	the message DIRECT PA comes on.
	On the forward and aft left AIPs 320RH, the mid and exit AIPs 322RH:
	the message DIRECT PA IN USE comes on.
	On the handset:
	the dial tone stops.
	In the cabin, all the lavatories, the forward and mid attendant stations:
	you hear a LO-HI-LO tone.
	you hear the announcement.
put the handset back into its cradle.	All indications go off.
	On the handset:
remove the handset from the cradle.	you hear a dial tone.
	On the aft right AIP 320RH:
	the number symbol flashes.
push the PA pushbutton switch.	On the handset:
	the dial tone stops:
	On the aft right AIP 320RH:
	the number symbol goes off.
	the message PA ALL comes on.
	On the forward and aft left AIPs 320RH, the mid and exit AIPs 322RH:
	the message PA ALL IN USE comes on.
	In the cabin, all the lavatories, the forward and mid attendant stations:
push and hold the PTT and make an announcement.	you hear a LO-HI-LO tone.
	you hear the announcement.
	In the cockpit:
	you hear the announcement through the handset and the loudspeaker.
put the handset back into its cradle.	All indications go off.
8.On the CAPT Audio Selector Panel:	On the CAPT Audio Selector Panel:
push to reset and turn the PA rotary knob fully ccw.	the integral light in the PA rotary knob goes off.
9.On the Main Instrument Panel 301VU:
turn the LOUDSPEAKER rotary knob fully ccw.

Subtask 23-73-00-710-242-T ** ON A/C NOT FOR ALL

B. Test of PA announcement from the cabin.

ACTION	RESULT
1.On the Main Instrument Panel 301VU:
turn the LOUDSPEAKER rotary knob fully cw.
2.On the CAPT Audio Selector Panel:	On the CAPT Audio Selector Panel:
push and turn the PA rotary knob fully cw.	the integral light in the PA rotary knob comes on.
3.At the forward Attendant Station:	On the handset:
remove the handset from the cradle.	you hear a dial tone.

	On the forward AIP 320RH:
	the number symbol flashes.
push and hold the PTT and make an announcement.	the number symbol goes off.
	the message DIRECT PA comes on.
	On the aft AIP 320RH and the mid and exit AIPs 321RH/322RH:
	the DIRECT PA IN USE message comes on.
	On the handset:
	the dial tone is off.
	In the cabin, all the lavatories, the mid, exit and aft attendant stations:
	you hear the announcement through the loudspeakers.
	In the cockpit:
	you hear the announcement through the handset and the loudspeaker.
put the handset back into its cradle.	All indications go off.
	On the handset:
remove the handset from the cradle.	you hear a dial tone.
	On the forward AIP 320RH:
	the number symbol flashes.
push the PA pushbutton switch.	On the handset:
	the dial tone stops.
	On the forward AIP 320RH:
	the number symbol goes off.
	the message PA ALL comes on.
	At the aft AIP 320RH and the mid and exit AIPs 321RH/322RH:
	the message PA ALL IN USE comes on.
	In the cabin, all lavatories, the mid, exit and the aft attendant stations:
push and hold the PTT and make an announcement.	you hear the announcement through the loudspeakers.
	In the cockpit:
	you hear the announcement through the handset and the loudspeaker.
put the handset back into its cradle.	All indications go off.
4.At the mid Attendant Station:	On the handset:
remove the handset from the cradle.	you hear a dial tone.
	On the mid AIP 322RH:
	the number symbol flashes.
push and hold the PTT and make an announcement.	the number symbol goes off.
	the message DIRECT PA comes on.
	On the forward and aft AIPs 320RH and the exit AIPs 321RH/322RH:
	the message DIRECT PA IN USE comes on.
	On the handset:
	the dial tone stops.
	In the cabin, all lavatories, the forward, exit and aft attendant stations:
	you hear the announcement through the loudspeakers.
put the handset back into its cradle.	All indications go off.
remove the handset from the cradle.	On the handset:
	you hear a dial tone.
	On the mid AIP 322RH:
	the number symbol flashes.
push the PA pushbutton switch.	On the handset:
	the dial tone stops.
	On the mid AIP 322RH:
	the number symbol goes off.
	the message PA ALL comes on.
	On the forward and aft AIPs 320RH and the exit AIPs 321RH/322RH:
	the message PA ALL IN USE comes on.
	In the cabin, all lavatories, the forward, exit and the aft attendant stations:
push and hold the PTT and make an announcement.	you hear the announcement through the loudspeakers.
	In the cockpit:
	you hear the announcement through the handset and the loudspeaker.
put the handset back into its cradle.	All indications go off.
5.At the exit attendant station:	On the handset:
remove the handset from the cradle.	you hear a dial tone.
	On the exit AIPs 321RH/322RH:
	the number symbol flashes.
push and hold the PTT and make an announcement.	the number symbol goes off.
	the message DIRECT PA comes on.
	On the forward and aft AIPs 320RH and the mid AIP 322RH:
	the message DIRECT PA IN USE comes on.
	On the handset:
	the dial stops.
	In the cabin, all the lavatories, the forward and mid attendant stations:
	you hear the anouncement through the loudspeakers.
	put the handset back into its cradle.
	All indications go off.
	In the handset:
remove the handset from the cradle.	you hear a dial tone.
	On the exit AIPs 321RH/322RH:
	the number symbol flashes.
push the PA pushbutton switch.	On the handset:
	the dial tone stops:
	On the exit AIPs 321RH/322RH:
	the number symbol goes off.
	the message PA ALL comes on.
	On the forward and aft AIPs 320RH and the mid AIP 322RH:
	the message PA ALL IN USE comes on.
	In the cabin, all lavatories, the forward and mid attendant stations:
push and hold the PTT and make an announcement.	you hear the announcement through the loudspeakers.
	In the cockpit:
	you hear the announcement through the handset and the loudspeaker.
put the handset back into its cradle.	All indications go off.
6.At the aft left attendant station:	On the handset:
remove the handset from the cradle.	you hear a dial tone.
	On the aft left AIP 320RH:
	the number symbol flashes.
push and hold the PTT and make an announcement.	the number symbol goes off.
	the message DIRECT PA comes on.
	On the forward and aft right AIPs 320RH, the mid and exit AIPs 321RH/322RH:
	the message DIRECT PA IN USE comes on.
	On the handset:
	the dial tone stops.
	In the cabin, all the lavatories, the forward and mid attendant stations:
	you hear the announcement through the loudspeakers.
put the handset back into its cradle.	All indications go off.
	On the handset:
remove the handset from the cradle.	you hear a dial tone.
	On the aft left AIP 320RH:
	the number symbol flashes.
push the PA pushbutton switch.	On the handset:
	the dial tone stops.
	On the aft left AIP 320RH:
	the number symbol goes off.
	the message PA ALL comes on.
	On the forward and aft right AIPs 320RH, the mid and exit AIPs 321RH/322RH:
	the message PA ALL IN USE comes on.
	In the cabin, all lavatories, the forward and mid attendant stations:
push and hold the PTT and make an announcement.	you hear the announcement through the loudspeakers.
	In the cockpit:
	you hear the announcement through the handset and the loudspeaker.
put the handset back into its cradle.	All indications go off.
7.At the aft right attendant station:	On the handset:
remove the handset from the cradle.	you hear a dial tone.
	On the aft right AIP 320RH:
	the number symbol flashes.
push and hold the PTT and make an announcement.	the number symbol goes off.
	the message DIRECT PA comes on.
	On the forward and aft left AIPs 320RH, the mid and exit AIPs 321RH/322RH:
	the message DIRECT PA IN USE comes on.
	On the handset:
	the dial tone stops.
	In the cabin, all the lavatories, the forward and mid attendant stations:
	you hear the announcement through the loudspeakers.
put the handset back into its cradle.	All indications go off.
	On the handset:
remove the handset from the cradle.	you hear a dial tone.
	On the aft right AIP 320RH:
	the number symbol flashes.
push the PA pushbutton switch.	On the handset:
	the dial tone stops:
	On the aft right AIP 320RH:
	the number symbol goes off.
	the message PA ALL comes on.
	On the forward and aft left AIPs 320RH, the mid and exit AIPs 321RH/322RH:
	the message PA ALL IN USE comes on.
	In the cabin, all lavatories, the forward and mid attendant stations:
push and hold the PTT and make an announcement.	you hear the announcement through the loudspeakers.
	In the cockpit:
	you hear the announcement through the handset and the loudspeaker.
put the handset back into its cradle.	All indications go off.
8.On the CAPT Audio Selector Panel:	On the CAPT Audio Selector Panel:
push to reset and turn the PA rotary knob fully ccw.	the integral light in the PA rotary knob goes off.
9.On the Main Instrument Panel 301VU:
turn the LOUDSPEAKER rotary knob fully ccw.

Subtask 23-73-00-710-355-B ** ON A/C NOT FOR ALL

C. Test of PA announcement from the cabin.

ACTION	RESULT
1.On the Main Instrument Panel 301VU:
turn the LOUDSPEAKER rotary knob fully cw.
2.On the audio control panel in the cockpit:	On the audio control panel in the cockpit:
push and turn the PA rotary knob fully cw.	the integral light of the PA rotary knob comes on.
3.At the forward attendant station:	On the forward left Attendant Indication Panel (AIP) 320RH:
lift the handset from the cradle.	the number symbol flashes.
push the PA pushbutton.	two number symbols flash.
push the ALL pushbutton.	two number symbols go off.
	the message PA ALL comes on.
	On all other AIPs except AIP(s) of the calling attendant station:
push and hold the PTT pushbutton switch.	the message PA ALL IN USE comes on.
	In the cabin, in all lavatories and at all other attendant stations except the calling attendant station:
make an announcement.	you hear the announcement.
	On all other AIPs except AIP(s) of the calling attendant station:
push to release the PTT pushbutton switch.	the message PA ALL IN USE goes off.
	In the cabin, in all lavatories and at all other attendant stations except the calling attendant station:
	the announcement stops.
4.On the handset of the forward attendant station:	On the forward left AIP 320RH:
push the RESET button.	the message PA ALL goes off.
	the message RST shows for approx. 1 sec.
	the number symbol flashes.
5.Repeat the steps 3 thru 4 for all applicable PA functions for the handset of the forward attendant station.	the indications of the AIPs are the same as in steps 3 thru 4. The distribution of the announcements corresponds to the related PA functions in the related cabin areas.
6.At the forward attendant station:	On the forward left AIP 320RH:
put the handset back into its cradle.	the number symbol goes off.
7.Repeat the steps 3 thru 6 for the handsets for all other attendant stations.	the indications of the AIPs and the announcements are the same as by steps 3 thru 6.
8.On the audio control panel in the cockpit:	On the audio control panel in the cockpit:
push to reset and turn the PA rotary knob fully ccw.	the integral light of the PA rotary knob goes off.
9.On the Main Instrument Panel 301VU:
turn the LOUDSPEAKER rotary knob fully ccw.

Subtask 23-73-00-710-355-F ** ON A/C NOT FOR ALL

C. Test of PA announcement from the cabin.

ACTION	RESULT
1.On the Main Instrument Panel 301VU:
turn the LOUDSPEAKER rotary knob fully cw.
2.On the audio control panel in the cockpit:	On the audio control panel in the cockpit:
push and turn the PA rotary knob fully cw.	the integral light of the PA rotary knob comes on.
3.At the forward attendant station:	On the forward left Attendant Indication Panel (AIP) 320RH:
lift the handset from the cradle.	the number symbol flashes.
push the PA ALL pushbutton.	the number symbol goes off.
	the message PA ALL comes on.
	On all other AIPs except AIP(s) of the calling attendant station:
push and hold the PTT pushbutton switch.	the message PA ALL IN USE comes on.
	In the cabin, in all lavatories and at all other attendant stations except the calling attendant station:
make an announcement.	you hear the announcement.
push to release the PTT pushbutton switch.	On all other AIPs except AIP(s) of the calling attendant station:
	the message PA ALL IN USE goes off.
	In the cabin, in all lavatories and at all other attendant stations except the calling attendant station:
	the announcement stops.

4.On the handset of the forward attendant station:	On the forward left AIP 320RH:
push the RESET button.	the message PA ALL goes off.
	the message RST shows for approx. 1 sec.
	the number symbol flashes.
5.At the forward attendant station:	On the forward left AIP 320RH:
put the handset back into its cradle.	the number symbol goes off.
6.Repeat the steps 3 thru 5 for the handsets for all other attendant stations.	the indications of the AIPs and the announcements are the same as in steps 3 thru 5.
7.On the audio control panel in the cockpit:	On the audio control panel in the cockpit:
push to reset and turn the PA rotary knob fully ccw.	the integral light of the PA rotary knob goes off.
8.On the Main Instrument Panel 301VU:
turn the LOUDSPEAKER rotary knob fully ccw.

Subtask 23-73-00-710-243-C ** ON A/C NOT FOR ALL

D. Test of priorities.

ACTION	RESULT
1.At the MID ATTND Station:	On the MID AIP 322RH:
lift the handset from the cradle.	'#' symbol comes on.
	On the handset:
	a dial tone is heard.
push the PA pushbutton switch.	the tone stops.
	On the MID AIP 322RH:
	'##' symbol comes on.
push the ALL pushbutton switch.	'##' symbol goes off.
	the message PA ALL comes on.
	On the FWD, EXIT and AFT AIPs 320RH and 322RH:
	the message PA ALL IN USE comes on.
	In the cabin, in all lavatories and at the FWD, EXIT and AFT ATTND Stations:
push the PTT and do an announcment.	a LO-HI-LO tone is heard.
	the announcement is heard.
2.At the FWD ATTND station:	On the FWD AIP 320RH:
lift the handset from the cradle.	the '#' symbol comes on.
	In the handset:
	a dial tone is heard.
3.On the handset:
push the PA pushbutton switch.	the dial tone stops.
	On the FWD AIP 320RH:
	the '##' symbol comes on.
push the ALL pushbutton switch.	the '##' symbol goes off.
	the PA ALL IN USE message goes off.
	the PA ALL message comes on.
	On the MID AIP 322RH:
	the WAIT message comes on.
	the PA ALL IN USE message comes on.
4.At the FWD ATTND station:	In the cabin, in all lavatories and at the MID, EXIT and AFT ATTND stations:
push the PTT and do an announcement during the announcement from the MID ATTND station.	a LO-HI-LO tone is heard.
	only the FWD attendant announcement is heard.
5.At the MID ATTND station:	At the MID AIP 322RH:
put the handset back to the cradle.	the WAIT and PA ALL messages go off.
6.In the cockpit:	In the cabin, all lavatories and all ATTND stations:
lift the handset from the cradle.
push the PTT and do an announcement during the announcement from the FWD attendant station.	a LO-HI-LO tone is heard.
	only the cockpit announcement is heard from the loudspeakers.
	On the FWD AIP 320RH:
	the messages PA ALL IN USE and WAIT come on.
7.At the FWD ATTND station:
put the handset back to the cradle.	the PA ALL and WAIT messages go off.
8.On the CAPT audio selector panel:	On the CAPT audio selector panel:
push and hold the PA pushbutton switch.	the integral light of the PA pushbutton comes on.
9.In the cockpit on the hand microphone:	In the cabin, in all lavatories and at all ATTND stations:
push the PTT and speak into the hand microphone during the announcements from the cockpit.	a LO-HI-LO tone is heard.
	only the cockpit hand microphone announcement is heard.
10.On the CAPT audio selector panel:	On the CAPT audio selector panel:
release the PA pushbutton switch.	the integral light of the PA pushbutton switch goes off.
11.In the cockpit:	On all AIPs 320RH and 322RH:
put the handset and the hand microphone back to the cradles.	the PA ALL IN USE message goes off.

Subtask 23-73-00-710-243-I ** ON A/C NOT FOR ALL

D. Do the priority test

ACTION	RESULT
1.At the aft left attendant station:	Through the aft left attendant station handset:
Lift the handset from the cradle.	You hear a dial tone.
	On the aft left Attendant Indication Panel (AIP) 320RH:
	'#' shows.
On the aft left attendant station handset:
Push and release the PA pushbutton.	'##' shows.
Push and relese the ALL pushbutton.	'##' goes off.
	'PA ALL' shows.
	On the all other AIPs:
	'PA ALL IN USE' shows.
	In the cabin, in all lavatories and at the forward, mid and exit attendant station:
Push and hold the PTT switch and make an announcement.	You hear a LO-HI-LO chime and then the announcement.
2.At the forward attendant station:	Through the forward attendant station handset:
Lift the handset from the cradle.	You hear a dial tone.
	On the forward left AIP:
	'#' shows.
On the forward attendant station handset:
Push and release the PA pushbutton.	'##' shows.
Push and release the ALL pushbutton.	'##' goes off.
	'PA ALL' shows.
	On the aft left AIP:
	'WAIT PA ALL' shows.
	In the cabin, in all lavatories and at the mid, exit and aft attendant stations:
Push and hold the PTT switch and make an announcement during the announcement from the aft left attendant station.	You hear a LO-HI-LO chime and then announcement from the forward attendant station only.
3.At the aft left attendant station:	On the aft left AIP:
Release the PTT switch and put the handset back in the cradle.	'WAIT PA ALL' goes off.
	'PA ALL IN USE' shows.
4.In the cockpit:
Lift the handset from the cradle.
On the cockpit handset:	In the cabin, in all lavatories and at all attendant stations:
Push and hold the PTT switch and make an announcement during the announcement from the forward attendant station.	you hear a LO-HI-LO chime and then the announcement from the cockpit handset only.
	On the forward LH AIP:
	'WAIT DIRECT PA' shows.
	On the mid, exit and aft AIPs:
	'DIRECT PA IN USE' shows.
5.At the forward attendant station:	On the forward LH AIP:
Release the PTT switch and put the handset back in the cradle.	'WAIT DIRECT PA' goes off.
	'DIRECT PA IN USE' shows.
6.In the cockpit, on the audio control panel:	In the cockpit, on the audio control panel:
Push and release the PA pushbutton switch.	The integral light of the PA pushbutton switch comes on.
7.In the cockpit, on the hand microphone:	In the cabin, in all lavatories and at all attendant stations:
Push and hold the PTT switch and make an announcement during the announcement from the cockpit handset.	You hear a LO-HI-LO chime and then the announcement from the cockpit hand microphone only.
8.In the cockpit, on the audio control panel:	In the cockpit, on the audio control panel:
Push and release the PA pushbutton switch.	The integral light of the PA pushbutton switch goes off.
9.In the cockpit:	On all AIPs:
Release the PTT switch and put the hand microphone and the handset back in the cradle.	'DIRECT PA IN USE' goes off.

Subtask 23-73-00-710-243-J ** ON A/C NOT FOR ALL

D. Do the priority test

ACTION	RESULT
1.At the aft left attendant station:	Through the aft left attendant-station handset:
Lift the handset from the cradle.	You hear a dial tone.
	On the aft left Attendant Indication Panel (AIP) 320RH:
	The number symbol flashes.

On the aft left attendant-station handset:
Push and hold the PTT switch.	The number symbol goes off.
	The message > DIRECT PA comes on.
	On all other AIPs:
	The message DIRECT PA IN USE comes on.
	In the cabin, in all lavatories and at all other attendant stations:
Make an announcement.	You hear the announcement.
2.At the forward attendant station:	Through the forward attendant-station handset:
Lift the handset from the cradle.	You hear a dial tone.
	On the forward left AIP:
	The number symbol flashes.

On the forward attendant-station handset:
Push and hold the PTT switch.	The number symbol goes off.
	The message DIRECT PA IN USE changes to the message > DIRECT PA.
	Through the handset at the aft left attendant station:
	You hear the busy tone.
	On the aft left AIP 320RH:
	The message WAIT DIRECT PA comes on.
	On all other AIPs:
	The message DIRECT PA IN USE comes on.
	In the cabin, in all lavatories and at all other attendant stations:
Make an announcement during the announcement from the aft left attendant station.	You hear the announcement from the forward attendant station only.
3.At the aft left attendant station:	On the aft left AIP:
Release the PTT switch and put the handset back in the cradle.	The message WAIT DIRECT PA goes off.
	The message DIRECT PA IN USE shows.
4.In the cockpit:
Lift the handset from the cradle.
On the cockpit handset:	Through the handset at the forward attendant station:
Push and hold the PTT switch.	You hear the busy tone.
	On the forward left AIP:
	The messages WAIT DIRECT PA and DIRECT PA IN USE show.
	In the cabin, in all lavatories and at all attendant stations:
Make an announcement during the announcement from the forward attendant station.	You hear the announcement from the cockpit handset only.
5.At the forward attendant station:	On the forward left AIP:
Release the PTT switch and put the handset back in the cradle.	The message WAIT DIRECT PA goes off.
	The message DIRECT PA IN USE shows.
6.In the cockpit, on the audio control panel:	In the cockpit, on the audio control panel:
Push and turn the PA rotary knob fully cw.	The integral light of the PA rotary knob comes on.
Push and hold the PA pushbutton switch.	The integral light of the PA pushbutton switch comes on.
	Through the cockpit boomset:
	You hear the busy tone.
7.On the boomset in the cockpit:	In the cabin, in all lavatories and at all attendant stations:
Make an announcement during the announcement from the cockpit handset.	You hear the announcement from the cockpit boomset only.
8.In the cockpit:
Release the PTT switch and put the handset back into its cradle.
9.In the cockpit, on the audio control panel:	In the cockpit, on the audio control panel:
Push to release the PA pushbutton switch.	The integral light of the PA pushbutton switch goes off.
	In the cabin, in all lavatories and at all attendant stations:
	The announcement stops.
	On all AIPs:
	All indications go off.
Push to reset and turn the PA rotary knob fully ccw.	The integral light of the PA rotary knob goes off.

Subtask 23-73-00-710-243-K ** ON A/C NOT FOR ALL

D. Do the priority test

ACTION	RESULT
1.At the forward attendant station:	Through the forward attendant station handset:
lift the handset from the cradle.	you hear a dial tone.

	On the forward left Attendant Indication Panel (AIP) 320RH:
	the number symbol flashes.

On the forward attendant station handset:
push the PA pushbutton.	two number symbols flash.
push the ALL pushbutton.	the number symbols go off.
	the message PA ALL shows.

	On the mid right, exit right, and aft AIPs:
	the message PA ALL IN USE shows.

	In the cabin, in all lavatories and at the mid, exit and aft attendant stations:
push and hold the PTT switch and make an announcement.	you hear the announcement.
2.In the cockpit:
lift the handset from the cradle.

On the cockpit handset:	In the cabin, in all lavatories and at all attendant stations:
push and hold the PTT switch and make an announcement during the announcement from the forward attendant station.	you hear the announcement from the cockpit handset only.

	On the forward left AIP:
	the message WAIT PA ALL shows.

	On the mid right, exit right and aft AIPs:
	the message DIRECT PA IN USE shows.
3.At the forward attendant station:	On the forward left AIP:
release the PTT switch and put the handset back in the cradle.	the message WAIT PA ALL goes off.
	the message DIRECT PA IN USE shows.
4.In the cockpit, on the audio control panel:	In the cockpit, on the audio control panel:
push and hold the PA pushbutton switch.	the integral light of the PA pushbutton switch comes on.
5.In the cockpit, on the hand microphone:	In the cabin, in all lavatories and at all attendant stations:
push and hold the PTT switch and make an announcement during the announcement from the cockpit handset.	you hear the announcement from the cockpit hand microphone only.
6.In the cockpit, on the audio control panel:	In the cockpit, on the audio control panel:
release the PA pushbutton switch.	the integral light of the PA pushbutton switch goes off.
7.In the cockpit:	On all AIPs:
release the PTT switch and put the hand microphone and the handset back in the cradle.	the message DIRECT PA IN USE goes off.

Subtask 23-73-00-710-243-L ** ON A/C NOT FOR ALL

D. Do the priority test

ACTION	RESULT
1.At the aft left attendant station:	Through the aft left attendant station-handset:
lift the handset from the cradle.	you hear a dial tone.

	On the aft left Attendant Indication Panel (AIP) 320RH:
	the number symbol flashes.

On the aft left attendant station-handset:
push the PA ALL pushbutton.	the number symbol goes off.
	the message PA ALL shows.

	On the forward, mid, exit and aft right AIP:
	the message PA ALL IN USE shows.

	In the cabin, in all lavatories and at the forward, mid and exit attendant stations:
push and hold the PTT switch and make an announcement.	you hear the announcement.
2.At the forward attendant station:	Through the forward attendant station-handset:
lift the handset from the cradle.	you hear a dial tone.

	On the forward left AIP:
	the number symbol flashes.

On the forward attendant station-handset:
push the PA ALL pushbutton.	the number symbol goes off.
	the message PA ALL shows.

	In the cabin, in all lavatories and at the mid, exit and aft attendant stations:
push and hold the PTT switch and make an announcement during the announcement from the aft left attendant station.	you hear the announcement from the forward attendant station.
	On the aft left AIP:
	the message WAIT PA ALL shows.
3.At the aft left attendant station:	On the aft left AIP:
release the PTT switch and put the handset back in the cradle.	the message WAIT PA ALL goes off.
	the message PA ALL IN USE shows.
4.In the cockpit:
lift the handset from the cradle.

On the cockpit handset:	In the cabin, in all lavatories and at all attendant stations:
push and hold the PTT switch and make an announcement during the announcement from the forward attendant station.	you hear the announcement from the cockpit handset.

	On the forward left AIP:
	the message WAIT DIRECT PA shows.

	On the mid, exit and aft AIPs:
	the message DIRECT PA IN USE shows.
5.At the forward attendant station:	On the forward left AIP:
release the PTT switch and put the handset back in the cradle.	the message WAIT DIRECT PA goes off.
	the message DIRECT PA IN USE shows.
6.In the cockpit, on the audio control panel:	In the cockpit, on the audio control panel:
push the PA pushbutton switch.	the integral light of the PA pushbutton switch comes on.
7.In the cockpit, on the hand microphone:	In the cabin, in all lavatories and at all attendant stations:
push and hold the PTT switch and make an announcement during the announcement from the cockpit handset.	you hear the announcement from the cockpit hand microphone.
8.In the cockpit, on the audio control panel:	In the cockpit, on the audio control panel:
release the PA pushbutton switch.	the integral light of the PA pushbutton switch goes off.
9.In the cockpit:	On all AIPs:
release the PTT switch and put the hand microphone and the handset back in the cradle.	the message DIRECT PA IN USE goes off.

Subtask 23-73-00-710-243-M ** ON A/C NOT FOR ALL

D. Do the priority test

ACTION	RESULT
1.At the forward attendant station:	Through the forward attendant station handset:
lift the handset from the cradle.	you hear a dial tone.

	On the forward left Attendant Indication Panel (AIP) 320RH:
	the number symbol flashes.

On the forward attendant station handset:
push the PA ALL pushbutton.	the message PA ALL shows.

	On all other AIPs except AIP(s) of the calling attendant station:
	the message PA ALL IN USE comes on.

	In the cabin, in all lavatories and at all other attendant stations except the calling attendant station:
push and hold the PTT switch and make an announcement.	you hear the announcement.
2.In the cockpit:
lift the handset from the cradle.

On the cockpit handset:	In the cabin, in all lavatories and at all attendant stations:
push and hold the PTT switch and make an announcement during the announcement from the forward attendant station.	you hear the announcement from the cockpit handset only.

	On the forward left AIP:
	the message WAIT DIRECT PA shows.

	On all other AIPs:
	the message DIRECT PA IN USE shows.
3.At the forward attendant station:	On the forward left AIP:
release the PTT switch and put the handset back in the cradle.	the message WAIT DIRECT PA goes off.

	the message DIRECT PA IN USE shows.
4.In the cockpit, on the audio control panel:	In the cockpit, on the audio control panel:
push the PA pushbutton switch.	the integral light of the PA pushbutton switch comes on.
5.On the cockpit boomset in the cockpit:	In the cabin, in all lavatories and at all attendant stations:
push and hold the PTT switch and make an announcement during the announcement from the cockpit handset.	you hear the announcement from the cockpit boomset only.
6.In the cockpit, on the audio control panel:	In the cockpit, on the audio control panel:
release the PA pushbutton switch.	the integral light of the PA pushbutton switch goes off.
7.In the cockpit:	On all AIPs:
release the PTT switch and put the handset back in the cradle.	all indications do off.

Subtask 23-73-00-710-267-A ** ON A/C NOT FOR ALL

E. Do the test of the automatic low-volume announcement at the forward attendant station.

NOTE: You can ignore all CIDS-related indications in the cabin.

ACTION	RESULT
1.In the cabin:
close the cockpit door.
2.In the cockpit:
lift the handset from the cradle.
3.On the cockpit handset:	In the cabin, in all lavatories and all attendant stations:
push and hold the PTT pushbutton switch and make an announcement.	you hear the announcement.
4.In the cabin:	At the forward attendant station:
open the cockpit door during the announcement from the cockpit.	the volume of the announcement decreases to a lower level.
5.In the cabin:	At the forward attendant station:
close the cockpit door during the announcement from the cockpit.	the volume of the announcement increases to a normal level.
6.In the cockpit:
put the handset back in the cradle.

Subtask 23-73-00-710-240-A ** ON A/C NOT FOR ALL

F. Do the test of the automatic high-volume announcement.

NOTE: On all emergency oxygen-containers, make sure that the doorstop is set to the test position.

NOTE: Do not hold the MASK MAN ON pushbutton switch for more than 30 sec., because the FAULT indication light in the TMR RESET pushbutton switch comes on after 30 sec.

ACTION	RESULT
1.At the forward attendant station:	On the forward LH Attendant Indication Panel (AIP) 320RH:
lift the handset from the cradle.	'#' shows.

	On the forward attendant station handset:
	you hear a dial tone.
push the PA pushbutton.
	On the forward LH AIP:
	'##' shows.
push the ALL pushbutton.	'##' goes off.
	'PA ALL' shows.

	In the cabin, in all lavatories and at the mid, exit and aft attendant stations:
push and hold the PTT and the PA pushbutton switch at the same time.	you hear a tone. NOTE: Before you start the next step of the test, make sure that all emergency oxygen-container doorstops are in the test position.
2.In the cockpit, on the circuit breaker panel 49VU:
open the C/Bs 2WR, 3WR, 4WR, 5WR and 6WR.
3.In the cockpit, on the overhead panel 21VU:	In the cabin:
lift the switch guard, push and release the MASK MAN ON pushbutton switch.	the doors of all emergency oxygen-containers (C/B 7WR related) open to test position.

	In the cabin, in all lavatories and at the mid, exit and aft attendant stations:
	you hear the tone with an increased volume.
4.In the cockpit, on the maintenance panel 50VU:
push and release the OXYGEN TMR RESET pushbutton switch.	you hear the tone with a decreased volume (normal level).
5.In the cockpit, on the circuit breaker panel 49VU:
open the C/B 2KS2.	you hear the tone with an increased volume.
close the C/B 2KS2.	you hear the tone with a decreased volume (normal level).
6.At the forward attendant station:
release the PTT and the PA pushbutton switch.	the tone stops.
put the handset back in the cradle.	all indications are cancelled.
7.In the cockpit, on the circuit breaker panel 49VU:
close the C/Bs 2WR, 3WR, 4WR, 5WR and 6WR.

Subtask 23-73-00-710-240-B ** ON A/C NOT FOR ALL

F. Do the test of the automatic high-volume announcement.

NOTE: On the emergency oxygen-containers set the door-stops to the test position.

NOTE: Do not hold the MASK MAN ON pushbutton switch for more than 30 sec., because the FAULT indication light in the TMR RESET pushbutton switch comes on after 30 sec.

ACTION	RESULT
1.At the FWD ATTND Station:	On the FWD Attendant Indication Panel (AIP) 320RH:
lift the handset from the cradle.	the number symbol comes on.
	On the handset:
	you hear a dial tone.
push the PA (or PA ALL) pushbutton switch.	the tone stops.
	the number symbol goes off.
	the message PA ALL comes on.
	In the cabin, all lavatories and the MID, EXIT and AFT ATTND Stations:
push and hold the PTT and the PA pushbutton switch.	you hear a tone through the loudspeakers. NOTE: Before you start the next test step make sure that all emergency oxygen-container door-stops are in the test position.
2.In the cockpit, on C/B Panel 49VU:
open C/Bs 2WR, 3WR, 4WR, 5WR and 6WR.
3.In the cockpit, on overhead panel 21VU:	In the cabin:
lift the switch guard, push and release the MASK MAN ON pushbutton switch.	the doors of the emergency oxygen containers (circuit breaker 7WR related) open to test position.
	In the cabin, all lavatories and the MID, EXIT and AFT ATTND Stations:
	the volume of the tone through the loudspeakers increases.
4.In the cockpit, on maintenance panel 50VU:
push and release the OXYGEN TMR RESET pushbutton switch.	the volume of the tone through the loudspeakers decreases to the normal level.
5.On C/B Panel 49VU:
open C/B 2KS2.	the volume of the tone increases.
close C/B 2KS2.	the volume of the tone through the loudspeakers decreases to the normal level.
6.At the FWD ATTND Station:
release the PTT and the PA pushbutton switch.	the tone stops.
put the handset back into its cradle.	all indications go off.
7.On the C/B Panel 49VU:
close C/Bs 2WR, 3WR, 4WR, 5WR and 6WR.

Subtask 23-73-00-710-240-D ** ON A/C NOT FOR ALL

F. Do the test of the automatic high-volume announcement

ACTION	RESULT
1.At the forward attendant station:	Through the handset at the forward attendant station:
Lift the handset from the cradle.	You hear a tone.
2.On the handset at the forward attendant station:
Push and hold the PTT pushbutton and make an announcement.
	In the cabin, in all lavatories and at the mid, exit and aft attendant stations: You hear the announcement. NOTE: You can ignore all CIDS-related indications in the cabin.
3.On all emergency oxygen-containers, make sure that the doorstop is set to the test position.
4.In the cockpit, on the circuit breaker panel 49VU: Open C/Bs 2WR, 3WR, 4WR, 5WR and 6WR.
In the cockpit, on the overhead panel 21VU: During the announcement from the forward attendant station, lift the switch guard and push the MASK MAN ON pushbutton switch. Do not hold the MASK MAN ON pushbutton switch for more than 30 seconds. NOTE: If you hold the MASK MAN ON pushbutton switch for more than 30 seconds, the FAULT indication light in the TMR RESET pushbutton-switch will come on.	In the cabin: The doors of all emergency oxygen-containers (C/B 7WR related) open to the test position.
	In the cabin, in all lavatories and at the mid, exit and aft attendant stations: You hear the announcement with an increased volume.
5.In the cockpit, on the maintenance panel 50VU: During the announcement from the forward attendant station, push the OXYGEN TMR RESET pushbutton switch.	You hear the announcement with a decreased volume (normal level).
6.In the cockpit, on the circuit breaker panel 49VU: During the announcement from the forward attendant station, open the C/B 2KS2.	You hear the announcement with an increased volume.
During the announcement from the forward attendant station, close the C/B 2KS2.	You hear the announcement with a decreased volume (normal level).
7.On the handset at the forward attendant station:	In the cabin:
Release the PTT pushbutton. Put the handset back in the cradle.	All indications and annunciations go off.
8.In the cockpit, on the circuit breaker panel 49VU: Close C/Bs 2WR, 3WR, 4WR, 5WR and 6WR.

Subtask 23-73-00-710-322-A ** ON A/C NOT FOR ALL

G. Test of the PA Monitoring Function in the Cockpit

NOTE: You can ignore all CIDS-related indications in the cabin.

ACTION	RESULT
1.In the cockpit, on main instrument panel 301VU:
Turn the LOUDSPEAKER rotary knob fully clockwise.
2.In the cockpit, on the audio control panel:	In the cockpit, on the audio control panel:
Push, release and turn the PA rotary knob fully clockwise.	The integral light of the PA rotary knob comes on.
3.In the cockpit:
Lift the handset from the cradle.
4.At the forward attendant station:	Through the forward attendant-station handset:
Lift the handset from the cradle.	You hear a dial tone.
5.On the forward attendant-station handset:	In the cabin, in all lavatories and at all attendant stations:
Push and hold the PTT switch and make an announcement.	You hear the announcement.
	In the cockpit:
	You hear the announcement.
6.At the forward attendant station:
Release the PTT switch and put the handset back in the cradle.
7.In the cockpit:
Put the handset back in the cradle.

5. Close-up
Subtask 23-73-00-865-255-A ** ON A/C NOT FOR ALL

A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	ENGINE/1 AND 2/IGN/SYS A	1JH	A03
121VU	ENGINE/IGN/ENG2/SYS B	3JH2	P42
121VU	ENGINE/IGN/ENG1/SYS B	3JH1	P41
** ON A/C NOT FOR ALL
121VU	ENGINE/IGN/ENG2/SYS A BAT	2JH2	P40
121VU	ENGINE/IGN/ENG1/SYS A BAT	2JH1	P39

Subtask 23-73-00-860-118-A ** ON A/C NOT FOR ALL

B. Put the aircraft back to its initial configuration.
(1) On the emergency containers, set the doorstops to the normal position.
(2) Make sure that the switch guard is in position on the MASK MAN ON pushbutton switch.
(3) Disconnect the headset from the CAPT Station
(4) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002)

[Rev.10 from 2021] 2026.04.01 06:18:03 UTC