AIRBUS M35 COMMUNICATIONS SINGLE AISLE TECHNICAL TRAINING MANUAL MAINTENANCE COURSE M35 LINE MECHANICS (V2500A5.ME)

SYSTEM OVERVIEW - FLIGHT INTERPHONE SYSTEM OPERATIONMAINTENANCE COURSE - M35 LINE MECHANICS V2500-A5/ME 23 - COMMUNICATIONS COMMUNICATIONS LEVEL 2 2 May 10, 2006 Page 7 SINGLE AISLE TECH

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SINGLE AISLE TECHNICAL TRAINING MANUAL MAINTENANCE COURSE - M35 LINE MECHANICS

(V2500-A5/ME) COMMUNICATIONS

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This document must be used for training purposes only

Under no circumstances should this document be used as a reference

It will not be updated.

No part of this manual may be reproduced in any form,

by photostat, microfilm, retrieval system, or any other means, without the prior written permission of AIRBUS S.A.S.

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GENERAL

Communications Level 2 (2) 2

SPEECH COMMUNICATION Flight Interphone System D/O (2) 12

Radio Communication D/O (2) 14

A/C COM ADDRESSING & REPORTING SYS (ACARS)(option ACARS VHF 3 Operation (2) 16

CABIN INTERCOM DATA SYSTEM (CIDS)(Classic) CIDS Director/DEU Architecture (3) 18

Cabin Attendant Handset Presentation (3) 22

Passenger Address System Description (3) 24

Service Interphone D/O (3) 26

Passenger Call System D/O (3) 30

Passenger Lighted Signs D/O (3) 34

PTP SYS Test & SYS Status Pages Presentation (3) 38

CABIN INTERCOM DATA SYSTEM (CIDS)(Enhanced) # Cabin Attendant Handset Presentation (3) 50

Passenger Address System Description (3) 52

# Service Interphone D/O (3) 54

Passenger Call System D/O (3) 58

Passenger Lighted Signs D/O (3) 62

CIDS Programming (3) 66

PASSENGER ENTERTAINMENT SYSTEM (PES) Passenger Entertainment System Presentation (1) 76

MAINTENANCE PRACTICE Electrostatic Discharge (2) 78

MAINTENANCE COURSE - M35 LINE MECHANICS (V2500-A5/ME)

23 - COMMUNICATIONS

TABLE OF CONTENTS May 11, 2006

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SINGLE AISLE TECHNICAL TRAINING MANUAL

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COMMUNICATIONS LEVEL 2 (2)

SYSTEM OVERVIEW

The use of the radio system on the Single Aisle aircraft is extremely

important for the safe operation of the aircraft While taxiing and towing,

communication is necessary with the tower to safely move the aircraft

Basic system description and procedures will enable the student to

understand system interconnect and correctly operate the systems by

selecting frequencies and setting transmission and reception modes In

addition, the use of the Service Interphone communications will also be

explained

The Panels and equipment that will be explained is as follows:

- Audio Control Panel (ACP),

- Radio Management Panel (RMP),

- Audio Management Unit (AMU),

- radio transceivers,

- acoustic equipment that includes: Boomsets, hand mikes, and handsets

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SYSTEM OVERVIEW (continued)

RMP FREQUENCY SELECTION

The Radio Management Panel (RMP) is the Digital tuning head for

the Communications transceivers They are located in the center

observer seat The panels have an over center ON/OFF switch When

the ON/OFF switch is switched to the ON position, two frequencies

that were previously selected appear in the ACTIVE and STandBY

windows To operate the transceiver, you might have to select a new

frequency on one of the VHF or HF transceivers To do this, you must

select the Transceiver that you wish to transmit on To select the radio,

the corresponding radio pushbutton must be pushed on the RMP The

associated green LED will come on

TRANSMISSION MODE

To connect one of the acoustical devices (microphone) to the

transmission line, the associated transmission key must be selected

on the Audio Control Panel (ACP)

When the transmission key is pressed (green light illuminated) you

are ready to transmit This selection can be disabled when you select

another transceiver or when you press the illuminated pushbutton

again Only ONE transmit key can be selected at a time

RECEPTION MODE

In order to listen on the selected transceiver, you must operate the

Audio Control Panel (ACP) On the ACP, the reception knobs allows

connection of the headsets / acoustic equipment to the transceiver

reception via the Audio Management Unit To select a transceiver,

the corresponding reception knob must be released out The reception

knob comes on white To adjust the reception volume level, the

selected reception knob must be turned Communications can now be

established

OPERATION

When one of the Push-to-Talk (PTT) switches is depressed, the handmike is connected, and in this case, the VHF 1 transceiver transmits.The boomset mike is connected when a PTT is pressed in on the ACP

or on the side stick

On the ACP, several reception knobs can be selected simultaneously

If the reception knob is pressed in again, the receiver is disconnectedand the white light goes off

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SYSTEM OVERVIEW - RMP FREQUENCY SELECTION OPERATION

23 - COMMUNICATIONS

COMMUNICATIONS LEVEL 2 (2) May 10, 2006

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FLIGHT INTERPHONE SYSTEM OPERATION

Flight interphone selection is necessary for voice communications

between flight crew members and for ground handling, taxiing and

towing This control is performed using the ACP If the flight crew

needs to maintain contact and communicate with the mechanic, the

flight crew can push the MECHanic pushbutton on the CALLS panel

on the overhead

The Flight Interphone can also act as a transceiver Selection of the

INTerphone transmission key lights the green bars, indicating that the

flight interphone is ready to operate Pressing and releasing the INT

reception knob illuminates the knob and enables adjustment of the

interphone audio level

The INTerphone/RADio selector switch must be in the INT position

The INT position enables permanent use of the flight interphone

without any further reaction and whatever radio key is selected The

INT/RAD switch is a 3-position switch with INT being a stable

position

The RAD selection connects the pre-selected channel to transmit The

RAD position is a momentary contact, and is spring loaded to the

center position This position acts like the selection of the hand

microphone pushbutton or the Push To Talk trigger on the side-stick

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SYSTEM OVERVIEW - FLIGHT INTERPHONE SYSTEM OPERATION

23 - COMMUNICATIONS

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SERVICE INTERPHONE SYSTEM OPERATION

The service interphone system is made up of eight service interphone

jacks located around the aircraft to facilitate communications between

maintenance personnel during troubleshooting, and between

maintenance and flight crew when performing coordinated tasks; i.e

Manual start valve operation

The audio lines from the cockpit, cabin and interphone jacks are routed

to the amplifiers through the amplifiers in the Cabin

Intercommunication and Data System (CIDS) Directors The system

is integrated in the CIDS directors There are 2 modes to connect the

jacks to the service interphone The automatic mode on ground only

with the landing gear down and compressed OR the external power

contactor connected The other mode is mentioned in the

MAINTENANCE TIPS section

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SYSTEM OVERVIEW - SERVICE INTERPHONE SYSTEM OPERATION

23 - COMMUNICATIONS

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MAINTENANCE TIPS

When jacking the aircraft it might be necessary to communicate between

personnel at various points around the aircraft Once the weight off

wheels, the service interphone system is disabled due to the logic of the

system The Landing Gear Control and Interface Unit (LGCIU) on ground

discrete disables all service interphone connections

The reason for this is to eliminate potential static noise generated and

amplified through the AMU due to the length of wires acting as antennae,

into the audio system

To re-enable the service interphone, the SerViCE INTerphone OVeRriDe

P/BSW must be switched to 'ON' The Service Interphone Override switch

is a guarded switch located on the Maintenance Panel 50VU on the

overhead in the cockpit

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FLIGHT INTERPHONE SYSTEM D/O (2)

INT SELECTION

The INT position of the INTerphone/RADio selector switch enables

permanent use of the flight interphone without any further action and

whatever the radio key selected (here VHF 1) This is a stable position

function So, even with the INT/RAD switch in INT position,

the flight interphone is momentarily cut during a radio emission

(radio key selected and hand microphone or side-stick Push To

Talk (PTT) actuated)

RAD SELECTION

The RAD position of the INT/RAD selector switch puts the pre-selected

channel in emission (here VHF 1) This is an unstable position This

position acts like the selection of the hand microphone pushbutton or like

the PTT pushbutton of the side-stick

INT KEY AND KNOB

The flight interphone is selected like a VHF transceiver Selection of the

INT transmission key lights the green bars, indicating that the flight

interphone is ready to operate Pressing and releasing the INT reception

knob adjusts the interphone level If done, the knob comes on white

Placing and holding the INT/RAD switch in RAD position lets the

operator talk through the flight interphone system

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INT SELECTION INT KEY AND KNOB

23 - COMMUNICATIONS

FLIGHT INTERPHONE SYSTEM D/O (2) May 10, 2006

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RADIO COMMUNICATION D/O (2)

FREQUENCY SELECTION

On the Radio Management Panel (RMP), when the ON/OFF switch is

set to ON position, two frequencies previously selected appear on the

windows To select a new frequency in a different system, the related

key must be pressed in on the RMP The associated green light comes

on The desired frequency can be selected in the STand-BY/CouRSe

window using the dual selector knob Pressing the transfer pushbutton,

activates the frequency and displays it in the active window, whereas the

previous active frequency becomes stand-by

TRANSMISSION MODE

To connect the transmission line to the chosen transmitter, the

corresponding transmission key must be pressed in on the Audio Control

Panel (ACP) Only one transceiver can be selected at a time This selection

can be disabled when:

- the transmission key, previously selected, is pressed in again,

- another transmitter is selected

RECEPTION MODE

On the ACP, the reception knob makes the connection of the headset to

the transceiver reception To select a receiver, the related reception knob

must be released out The reception knob comes on white To adjust the

reception level, the selected reception knob must be turned The

communication can now be established

OPERATION

When the Push-To-Talk (PTT) switch is pressed in, the hand mike is

connected and the VHF1 transceiver transmits The Boomset mike is

connected when the PTT is pressed in on the Side Stick or the PA

transmission key is pressed in on the ACP On the ACP, several reception

knobs can be selected simultaneously If the reception knob is pressed

in again, the receiver is disconnected and the white light goes off

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FREQUENCY SELECTION OPERATION

23 - COMMUNICATIONS

RADIO COMMUNICATION D/O (2) May 10, 2006

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ACARS VHF 3 OPERATION (2)

ACARS NORMAL OPERATION

This sequence deals with the useof the Radio Management Panel (RMP)

when VHF 3 is selected One window displays ACARS: the frequency

is then controlled by the Aircraft Communication Addressing and

Reporting System Management Unit (ACARS MU) The other window

shows a frequency value When this value is in the ACTIVE window,

the VHF3 is in voice mode and its frequency is controlled by the RMP

ACARS FAILURE

With the ACARS MU failed or selected OFF, the VHF 3 can only be

used with the Audio Management Unit (AMU) in normal audio

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ACARS NORMAL OPERATION & ACARS FAILURE

23 - COMMUNICATIONS

ACARS VHF 3 OPERATION (2) May 10, 2006

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CIDS DIRECTOR/DEU ARCHITECTURE (3)

DEU A

Twenty six to thirty two type A Decoder/Encoder Units (DEUs) are

installed above the windows in the cabin ceiling and close to the center

ceiling for the DEUs in the entrance area The type A DEUs are connected

to the directors (DIRs) via a top-line data bus (i.e : two wire twisted and

shielded cable) A broken wire in one top-line bus will only affect the

type A DEUs behind the crack on this bus The type A DEUs of the other

top-line bus will work without disturbance

PASSENGER SIGNS

The passenger signs include NO SMOKING or the optional NO

ELECTRONIC DEVICE lights, FASTEN SEAT BELT lights, NON

SMOKER ZONE lights and RETURN TO SEAT lights in the

lavatories Furthermore, for the passenger call system, the seat row

lights are connected to the type A DEUs

CABIN LIGHTS

The cabin lights include:

- entrance area lights,

The loudspeakers are installed in the Passenger Service Unit (PSU),

in each lavatory and near the attendant station They are all identical

and are used for:

- passenger address announcements,

- call chimes (optional)

PASSENGER CALL

Pushbuttons are installed on the PSU above each seat row and in thelavatories

READING/LIGHT POWER UNIT

One Reading/Light (R/L) power unit for three R/L is installed in eachPSU

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DEU A - PASSENGER SIGNS READING/LIGHT POWER UNIT

23 - COMMUNICATIONS

CIDS DIRECTOR/DEU ARCHITECTURE (3) May 10, 2006

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CIDS DIRECTOR/DEU ARCHITECTURE (3)

DEU B

Basically 4 type B DEUs (optional maximum of 6), are installed near the

exit doors in the center ceiling (Except A321, which can be equipped

with 8 DEUs B) They are connected to the DIRs via a middle line data

bus There are two supplementary DEU B mounts installed as a provision

Type B DEU interface, may vary with different locations and with specific

airline requirements

SLIDE PRESSURE SYSTEM (OPTIONAL)

The DIRs receive signals from the bottle pressure sensors via type B

DEUs If the pressure is low, the Cabin Intercommunication Data

System (CIDS) CAUTion light on the Forward Attendant Panel (FAP)

comes on

DOOR PRESSURE SYSTEM (OPTIONAL)

The DIRs receive signals from the bottle pressure sensors via type B

DEUs If the pressure is low, the CIDS CAUT light on the FAP comes

on

CREW INTERPHONE SYSTEM

The crew interphone system is used for the communication between

cockpit crew and cabin attendants and between each attendant station

with personnel at the service interphone connections

EPSU

The Emergency Power Supply Units (EPSU) are connected to type

B DEUs for the emergency lighting system test

DRAIN MAST

The DIRs receive signals from the drain mast control unit via type BDEUs If the drain mast heater or the control unit fails the CIDS CAUTlight on the FAP comes on

ATTENDANT INDICATION PANEL

One Attendant Indication Panel (AIP) is installed near each attendantseat for message purposes

AREA CALL PANEL

One basic and one optional Area Call Panel (ACP) can be connected

to each DEU B

ADDITIONAL ATTENDANTL PANEL

One Additional Attendant Panel (AAP) is installed near the afterattendants station

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DEU B - SLIDE PRESSURE SYSTEM (OPTIONAL) ADDITIONAL ATTENDANTL PANEL

23 - COMMUNICATIONS

CIDS DIRECTOR/DEU ARCHITECTURE (3) May 10, 2006

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CABIN ATTENDANT HANDSET PRESENTATION (3)

GENERAL

Each attendant station has a handset for public announcement, interphone

dialing and communication The handset rests in a cradle

FUNCTION

The handset and cradle fulfill the following functions:

- the hook-off sensing,

- the Push-To-Talk (PTT) switching,

- the Passenger Address (PA) announcement,

- the interphone

Handset volume adjustment: After removing the keyboard cover, two

potentiometers under the PTT button can be adjusted

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GENERAL & FUNCTION

23 - COMMUNICATIONS

CABIN ATTENDANT HANDSET PRESENTATION (3) May 10, 2006

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PASSENGER ADDRESS SYSTEM DESCRIPTION (3)

GENERAL

The Cabin Intercommunication Data System (CIDS) directors (DIRs)

accept audio signals from the various Passenger Address (PA) sources

in the aircraft The active DIR assigns priorities to each source It transmits

the signal in digital form via the four top-line data buses to the type A

Decoder/Encoder Units (DEUs) and, optionally via the Passenger

Entertainment System Main MUltipleXer (PESMMUX), to each

Passenger Control Unit (PCU) The type A DEUs send the signal to the

cabin loudspeakers for broadcasting The announcements can be heard,

at each passenger seat, with a headset

SOURCES

A PA announcement can be manually initiated from the cockpit and from

the cabin The announcement from the cockpit can be initiated with:

- the cockpit handset,

- other equipment: handmic, boomset mic, oxygen-mask mic in

conjunction with the Audio Control Panels (ACPs),

- the NO SMOKING and SEAT BELTS switches set to ON

The announcement from the cabin can be initiated with:

- the attendant handsets,

- the Forward Attendant Panel (FAP): from which the prerecorded

announcements, stored in the PRerecorded Announcement and Music

(PRAM), can be selected and initiated, as the BoardinG Music (BGM),

- if a video system is installed, PA announcements can be initiated from

the Video Control Unit (VCU) (optional)

A PA announcement can be automatically initiated from the PRAM when:

- the NO SMOKING and SEAT BELTS cockpit switches are set to AUTO

and according to the airline definition,

- a cabin decompression occurs

PRIORITY

The basic levels of priority are:

priority The levels of priority and the defined options are programmed

in the Cabin Assignment Module (CAM)

PA LEVEL

The volume of PA announcements can be automatically adjusted if severalconditions are met It is the active DIR which establishes the levelaccording to the software, sending the level setting to each individualtype A DEU Then the type A DEUs do the required amplification When

an engine is running, the PA volume is increased automatically by + 6

dB The PA volume is also increased by + 4 dB in the event of cabindepressurization Depending on software, PA level may be adjustablevia Programming and Test Panel (PTP) menu screens

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SERVICE INTERPHONE D/O (3)

GENERAL

The SerViCE INTerphone SYStem is a voice communications system

on the ground, between the flight crew and the ground service personnel

A communication can also be made between the attendant stations and

the dedicated jacks around or in the aircraft

SYSTEM DESCRIPTION

The SVCE INTPH SYS is made of:

- eight interphone jacks,

- a SVCE INTerphone OVerRiDe switch, with an integral indicator light

located on the maintenance panel in the cockpit,

- five isolation units, If there is a short-circuit condition in a

maintenance-interphone jack-socket, the isolation unit will keep the

effects of the failure on the service interphone system to a minimum

The audio lines from the cockpit, cabin and interphone jacks are routed

to the amplifiers in both Cabin Intercommunication Data System (CIDS)

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GENERAL & SYSTEM DESCRIPTION

23 - COMMUNICATIONS

SERVICE INTERPHONE D/O (3) May 10, 2006

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SERVICE INTERPHONE D/O (3)

LGCIU AND SERVICE INTERPHONE OVERRIDE

CONDITIONS

The SVCE INTPH SYS is integrated in the CIDS directors There are 2

modes to connect the jacks to the SVCE INTPH

The automatic mode:

On ground only, with the landing gear down and compressed The

Landing Gear Control and Interface Units (LGCIUs) send a ground signal

to the SVCE INTPH SYS, integrated in the directors

The manual mode:

The SVCE INT OVRD pushbutton, on the maintenance panel, must be

pressed Then the white ON light comes on The aircraft is on the ground

with no signal from the LGCIUs (e.g: The LGCIUs are not supplied)

When the SVCE INT OVRD pushbutton is pressed or when the aircraft

is on jacks, a ground signal is sent to the directors

OPERATIONS FROM COCKPIT

To establish a speech communication from the cockpit with the SVCE

INTPH jacks, the CABin key and knob on any Audio Control Panel

(ACP), must be pressed The audio signals are transmitted to the jacks

through the Audio Management Unit (AMU), the SVCE INTPH SYS,

integrated in the CIDS directors and the audio lines

OPERATIONS FROM CABIN STATION(S)

To establish a speech communication from the cabin with the SVCE

INTPH jacks, the SVCE key on the cabin attendant handset must be

pressed The message "SERV INT" is displayed on the calling station

Attendant Indication Panels (AIPs) On all other AIPs, the steady "SERV

INT IN USE" message appears The audio signals are digitized through

the type B Decoder/Encoder Units (DEUs) and transmitted through the

middle data bus lines to the directors After conversion to analog signals,

they are transmitted to the jacks through audio lines

ACPs in the cockpit and on the handset in the cabin), speechcommunications can be established between the cockpit, thecabin stations and the jacks

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LGCIU AND SERVICE INTERPHONE OVERRIDE CONDITIONS OPERATIONS FROM CABIN STATION(S)

23 - COMMUNICATIONS

SERVICE INTERPHONE D/O (3) May 10, 2006

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PASSENGER CALL SYSTEM D/O (3)

GENERAL

At Cabin Intercommunication Data System (CIDS) power-up a general

call reset will be initiated Any call initiated from a passenger seat or a

lavatory activates aural and visual indications If no passenger call is

made during boarding time, all seat row numbering lights will be steadily

illuminated If a passenger call is made during boarding time, the

respective seat row numbering light will flash

PASSENGER TO CABIN ATTND CALL FROM PASSENGER

SEAT (ONE CABIN ZONE)

When a passenger (PAX) seat PAX call pushbutton is pressed on the

Passenger Service Unit (PSU), the following actions occur:

- the associated seat row numbering light comes on,

- a high 1 chime is broadcast over all ATTeNDant and PAX loudspeakers,

- the blue light on all Area Call Panels (ACPs) comes on steady

If several pushbuttons are pressed simultaneously, a maximum of three

chimes sound The call indications associated with an activated pushbutton

are reset when the same pushbutton is pressed a second time

PASSENGER TO CABIN ATTND CALL FROM

LAVATORIES (ONE CABIN ZONE)

Basic version: When a lavatory call pushbutton is pressed, the following

actions occur:

- the integrated call light comes on,

- a chime is broadcast over all ATTNDs and PAX loudspeakers,

- the amber light comes on steady on the respective ACP,

- the respective lavatory call amber light comes on

Pressing the respective lavatory call pushbutton a second time resets the

associated call indications

OPTIONS

The following options could be embodied upon customer request:

- two zone PAX to cabin ATTND calls,

- three zone PAX to cabin ATTND calls,

- PAX to cabin ATTND call via cabin ATTND station loudspeakers only,

- central reset of PAX calls for all zones from the Forward AttendantPanel (FAP),

- central reset of PAX calls zone wise, from the FAP and AdditionalAttendant Panel (AAP),

- PAX call indication on Attendant Indication Panels (AIP),

- chime inhibition for PAX to cabin ATTND calls

Any of these options, once adopted, will be integrated in the CabinAssignment Module (CAM)

- the aural call annunciation (1 high chime) will be broadcast via thecabin and ATTND loudspeakers assigned to the PAX compartmentwhere the call has been initiated

PASSENGER TO CABIN ATTND CALL VIA CABIN ATTND STATION LOUDSPEAKERS ONLY

The visual call annunciation will be effective on the ACP assigned tothe PAX compartment where the call has been initiated The auralcall annunciation will be broadcast via the cabin ATTND loudspeakersassigned to the PAX compartment where the call has been initiated

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CENTRAL RESET OF PASSENGER CALLS FOR ALL

ZONES FROM THE FAP

A specific central reset button for all PAX calls from all zones is

installed on the FAP Both aural and visual indications are reset when

this pushbutton is pressed

CENTRAL RESET OF PASSENGER CALLS ZONE WISE

FROM THE FAP AND AAP

A central reset button for the forward section is installed on the FAP

A central reset button for the aft section is installed on the AAP

PASSENGER CALL INDICATION ON AIP

The seat row number with a LH or RH reference or the location of

the respective lavatory will be displayed in clear text on the AIPs A

second call received will be displayed after reset of the first call, if

more than one call and if designed for any AIP The respective

indications disappear when the call has been reset by pushing the

CALL button again If two or three zones PAX call is selected, the

individual calls will be indicated only on the AIPs which are assigned

to that particular PAX compartment call zone

CHIME INHIBITION FOR PASSENGER TO CABIN

ATTND CALLS

A CHIME INHIBIT button installed on the FAP for chime inhibition

The button must be pushed in order to inhibit the call chimes If the

button is pushed again the call chime is activated again Only the

chime is inhibited, visual indications remain unaffected

CALL FROM PCU

If a Passenger Entertainment System (PES) is installed on the aircraft

with the Passenger Services System (PSS) embodied, a PAX to cabin

ATTND call can be initiated from the Passenger Control Unit (PCU)

The results of this call are the same as the one defined when the call

is initiated from the PSU with all possible options

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PASSENGER CALL SYSTEM D/O (3) May 10, 2006

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23 - COMMUNICATIONS

PASSENGER CALL SYSTEM D/O (3) May 10, 2006

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PASSENGER LIGHTED SIGNS D/O (3)

GENERAL

No Smoking (NS) signs on is achieved by a 3-position switch

(ON/AUTO/OFF) in the flight compartment for NS and EXIT signs in

the passenger compartment Fasten Seat Belt (FSB) and return to seat

signs on is achieved by a 2-position switch (ON/OFF) in the flight

compartment for FSB signs in the passenger compartment and the return

to seat signs in the lavatories A class divider will be installed in the cabin

when more than one cabin zone is adopted

NS AND EXIT SIGNS

MANUAL MODE

In manual mode, the 3-position switch installed in the flight

compartment can be set in the ON/OFF position for

activation/deactivation of the NS and EXIT signs Visual indication:

the NS at the seat rows and the EXIT signs are switched on/off Aural

indication: one low chime is broadcast via all passenger and all

attendant (ATTND) loudspeakers when the signs are switched on/off

AUTOMATIC MODE

For the automatic mode, the 3-position switch installed in the flight

compartment has to be set in the AUTO position When the landing

gear is down and locked the NS and EXIT signs are switched on The

visual and aural indications are the same as in the manual mode

FSB AND RETURN TO SEAT SIGNS

MANUAL MODE

The2-position switch installed in the flight compartment can be set

in the ON/OFF position for activation/deactivation of the FSB and

return to seat signs Visual indication: the FSB signs at the seat rows

and the return to seat signs at the lavatories are switched on/off Aural

indication: One low chime is broadcast via all cabin and all ATTNDloudspeakers when the signs are switched on/off

The following options can be embodied upon customer request:

- flashing mode of passenger light signs,

- chime activation at signs "ON" operation only,

- automatic FSB signs control at landing gear down and locked,

- automatic FSB signs control when slats and flaps are activated,

- automatic NS signs control when slats and flaps are activated,

- combined NS/seat row numbering signs

Any of these options, once adopted, will be integrated in the CabinAssignment Module (CAM)

FLASHING MODE OF PASSENGER LIGHTED SIGNS

The FSB and NS will flash for approximately five seconds, when therelated switches in the flight compartment are set to the ON position.After expiration of this time period the signs will remain on and steadyuntil they are switched off

CHIME ACTIVATION AT SIGNS ON OPERATION ONLY

The passenger attention low-chime broadcast through the passengerand cabin attendant station loudspeakers will be initiated only whenthe SEAT BELTS or the NO SMOKING signs are switched on

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AUTOMATIC FSB SIGNS CONTROL AT LANDING

GEAR DOWN AND LOCKED

The FSB signs in the passenger compartment and the return to seat

signs in lavatories will come on if the SEAT BELTS switch in the

flight compartment is in the auto position and the landing gear is down

locked

AUTOMATIC FSB SIGNS CONTROL WHEN SLATS

AND FLAPS ARE ACTIVATED

The FSB signs in the passenger compartment and the return to seat

signs in lavatories will come on if the SEAT BELTS switch in the

flight compartment is in AUTO position and the slats and flaps are

activated

AUTOMATIC NS SIGNS CONTROL WHEN THE SLATS

AND FLAPS ARE ACTIVATED

The NS signs in the passenger compartment will come on if the NO

SMOKING switch in the flight compartment is in the AUTO position

and the slats and flaps are activated

COMBINED NS/SEAT ROW NUMBERING SIGNS

A combined NS and seat row numbering sign will be installed in each

Passenger Service Unit (PSU) The additional NS signs are activated

in parallel to the basic signs installed on the PSUs

NO ELECTRONIC DEVICE SIGNS

At customer request, the NS signs can be replaced by the no electronic

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