30 Questions
What is the primary function of the emergency crew alerting system?
To indicate unusual behavior in the cabin or cockpit
What is the purpose of the CIDS interface with the emergency lighting system?
To monitor the system and carry out battery-capacity tests
What is the primary function of the CIDS in commercial aircraft?
To control and display cabin functions for passengers and crew
What is the role of the sensor in the ice protection and control system?
To control the temperature through the sensor
What is the purpose of the two identical CIDS Directors (DIRs) in the system?
To enable redundant control and interface functionality
What is displayed on the FAP in relation to the CIDS?
The performance and operational requirements of the interfaced system
What is the role of the crosstalk bus in the CIDS system?
To check the results of the two CIDS Directors and enable the active director's output circuits
What is the function of the alert push-button in the emergency crew alerting system?
To initiate the alerting system
What is the function of the Onboard Replacement Module (OBRM) in the CIDS Director?
To replace faulty components in the CIDS Director
What is controlled via keys on the FAP in relation to the CIDS?
The interfaced systems
What is the primary component of the CIDS system that interfaces with the cabin crew?
Forward Attendant Panel (FAP)
How many Decoder/Encoder Units are employed in the CIDS system?
Two
What is required to access loud speaker level adjustment for announcements and chimes?
An access code
What is the function of the Audio Management Unit (AMU)?
To connect acoustic devices to the DIR
What happens when the PA transmission key is pressed and held?
The microphone audio is connected to the PA system
How do cabin attendants make announcements?
Via cabin crew stations handsets
What is possible with regards to an established PA announcement?
It can be overridden by another cabin station with a higher priority
What is the purpose of the Cabin Interphone System?
For communication between all cabin crew stations or between the cockpit and the cabin crew stations
What is the primary function of the Cabin Pressure Controller (CPC) in the event of a rapid decompression?
To activate the NS, FSB and EXIT signs automatically
What is the purpose of the passenger attention lo chime?
To get the attention of the passengers for a general announcement
How many illumination levels can the CIDS control?
Three
What is the function of the DEU-As in the passenger sign activation process?
To activate the passenger signs
How is the EVAC system activated from the FAP or AAP?
Through the relevant DEU-B and then to the active DIR
What is the purpose of the push-button switches on the FAP?
To control the illumination of the cabin areas
What is the primary function of the Ethernet Switch Unit (ESU) in the Cabin Network System?
To interface with devices connected to the cabin Ethernet
What is installed on the Cabin Network Server Unit (CNSU)?
Customized application software
What type of capability should Personnel Electronic Devices (PEDs) have to connect to the cabin wireless system?
IEEE 802.3 capability
What is the frequency range of the RF signals operated by the CWLU Antenna?
2.4 to 2.5 GHz
What is the function of the Centralized Maintenance Computer (CMC) in the Cabin Network System?
To monitor system integrity and provide defect reports
Where are the Cabin Wireless LAN Units (CWLU) typically mounted?
In various locations in the cabin area
Study Notes
Crew Signalling and Alerting
- The emergency crew alerting system indicates unusual behavior in the cabin or cockpit
- The system is initiated by the alert push-button from the cabin or cockpit
- It activates visual and aural warnings in the cockpit and cabin
CIDS Indicating and Control Functions
- The CIDS provides performance and operational requirements of the interfaced system on the FAP display
- The CIDS monitors and controls various systems, including:
- Emergency Lighting Power Supply
- Ice Protection and Control
- Doors/Slides
- The CIDS interface with the emergency lighting system monitors the system and carries out battery-capacity tests
CIDS Architecture
- The CIDS is a microprocessor-based system that controls and displays cabin functions for passengers and crew
- Components of the CIDS include:
- CIDS Director (DIR)
- Data links
- Decoder/Encoder Unit A (DEU A)
- Decoder/Encoder Unit B (DEU B)
- Forward Attendant Panel (FAP)
- Additional Attendant Panel (AAP)
- Area Call Panel (ACP)
- Attendant Indication Panels (AIP)
CIDS Director
- The CIDS Director (DIR) is the central control and interface component of the CIDS
- The system has two identical directors (DIRs) for redundancy, with one active and one in hot-standby mode
- Each DIR receives the same inputs and processes the information, with results checked via a crosstalk bus
Cabin Intercommunication Data System
- The Cabin Intercommunication Data System (CIDS) is used for communication between all cabin crew stations or between the cockpit and the cabin crew stations
- The system allows for announcements, music, and chimes to be broadcasted over all PA loudspeakers or passenger's headsets via the In-Flight Entertainment (IFE) system
Cabin Illumination
- The CIDS controls the illumination of different cabin areas independently
- The system has three illumination levels (bright, dim 1, and dim 2) and can be controlled by push-button switches on the FAP
Emergency-Evacuation
- The Emergency-Evacuation (EVAC) signalling system provides aural and visual signals to all crew members when activated from the cockpit or FAP
- The system prepares the crew for an evacuation from the aircraft
Cabin Network System (CNS)
- The CNS consists of:
- Ethernet Switch Unit (ESU)
- Cabin Network Server Unit (CNSU)
- Cabin Wireless LAN Unit (CWLU)
- Antenna CWLU
- The CNS enables Email services and airline-specific applications
- The CNSU does system processing and storage of data and files, and has connections with the Centralized Maintenance Computer (CMC)
Learn about the Cabin Intercommunication Data System (CIDS) used in commercial aircraft, specifically its architecture and functionality. Understand how it manages cabin functions for passengers and crew. Discover its role in Airbus' fleet of passenger aircraft.
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