Aircraft Systems: DEU-A Decoder/Encoder Unit Type-A
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Questions and Answers

What do the DEU-A units control in the aircraft?

  • Flight control systems
  • Pilot-related systems
  • Passenger-related systems (correct)
  • Engine-related systems

    • How many DEU-As are installed in the A380's baseline configuration?

  • 192
  • 16
  • 85 (correct)
  • 32

    • What connects the DEU-As to the DIRs?

  • CIDS data-bus (correct)
  • Hydraulic system
  • Electric wires
  • Aircraft power

    • Why are there two top line data buses on each side of the left, centre and right seat isles?

    <p>For redundancy purposes</p> Signup and view all the answers

    How are the installation addresses of DEU-As determined?

    <p>Through coding switches</p> Signup and view all the answers

    What is required to reconfigure the cabin layout in the CIDS?

    <p>A change to the software database</p> Signup and view all the answers

    Where are the cabin layout options loaded?

    <p>In the CAM</p> Signup and view all the answers

    What is found at the end connection box of each chain?

    <p>A Bus Termination Resistor (BTR)</p> Signup and view all the answers

    What is required to access the cabin layout selection function?

    <p>An access code</p> Signup and view all the answers

    Where can the cabin programming modes be accessed?

    <p>Both on the ground and in flight</p> Signup and view all the answers

    How can the system be reconfigured?

    <p>Through Field Loadable Software (FLS)</p> Signup and view all the answers

    What is the purpose of the BITE circuitry in the CIDS components?

    <p>To detect faults in the connected systems</p> Signup and view all the answers

    What is the purpose of the coding switches installed on each connection box?

    <p>To give the installation address of the DEU-B</p> Signup and view all the answers

    What happens if one connection box is not connected?

    <p>A related message is shown on the FAP/PIM and on the CMC/MCDU</p> Signup and view all the answers

    What is the function of the Forward Attendant Panel (FAP)?

    <p>To control and monitor the cabin support systems</p> Signup and view all the answers

    What is the purpose of the Bus Termination Resistor (BTR)?

    <p>To terminate the data bus</p> Signup and view all the answers

    What is the purpose of the DEU-B?

    <p>To control the various cabin systems such as ACP, AIP, AAP, Handsets, and EPSU</p> Signup and view all the answers

    What can be said about the DEU-Bs?

    <p>They are interchangeable</p> Signup and view all the answers

    What type of network connection does the CNS provide to the aircraft cabin?

    <p>High-speed communication connection based on standard ethernet</p> Signup and view all the answers

    What is the primary function of the Aircraft Network Server Unit (ANSU)?

    <p>To provide a common data file storage system for loadable software and other applications</p> Signup and view all the answers

    What is the purpose of the Data Communication Service?

    <p>To handle the communication between the end user and the aircraft network server system</p> Signup and view all the answers

    What type of devices can be connected to the CNS system?

    <p>Devices like laptops</p> Signup and view all the answers

    What is the interface between the ANSU and the ground network?

    <p>Terminal Wireless LAN Unit (TWLU)</p> Signup and view all the answers

    What type of switch is used to connect to ethernet LRUs in the Avionics Local Access Network (LAN)?

    <p>Ethernet switch</p> Signup and view all the answers

    What is the function of the antenna in the Cabin Network System?

    <p>To receive and transmit signals from wirelessly connected devices</p> Signup and view all the answers

    What is the data rate of the Cabin Connector?

    <p>Up to 100 Mbps</p> Signup and view all the answers

    Which system does the CNS interface with for landing gear control?

    <p>Landing Gear Control and Interface Unit</p> Signup and view all the answers

    What is the purpose of the Passenger Air-to-Ground Telephone System?

    <p>To allow passengers to fax documents during flight</p> Signup and view all the answers

    What is the function of the Satellite Data Unit in the PATS?

    <p>To interconnect with the Satellite Communication system</p> Signup and view all the answers

    What is the function of the fax machine in the PATS?

    <p>To establish voice and data connections to the public telephone network</p> Signup and view all the answers

    Study Notes

    Aircraft Network Server Unit (ANSU)

    • Provides a common data file storage system for loadable software and other applications
    • Acts as a host platform for airline applications, processing, and network communication services
    • Interfaced with Terminal Wireless LAN Unit (TWLU) for ground network connection with the Cabin Network System (CNS) and cockpit connections for PC or printer installation

    Data Communication Service

    • Handles communication between the end user and the aircraft network server system
    • Provides wireless Ethernet/email service, telephone, and fax facilities in the aircraft cabin area

    Cabin Network System (CNS)

    • Supplies the aircraft cabin with a high-speed communication connection based on standard Ethernet (IEEE 802.3) and standard network protocols
    • Allows flight and cabin crew, passengers, and maintenance personnel to connect devices like laptops to the LAN
    • Antenna receives signals from devices wirelessly connected to the LAN and transmits signals to the CWLUs and vice versa

    Cabin Connector

    • A wired network connection for the cabin crew with a data rate of up to 100 Mbps

    Interface Systems of the Cabin Network System

    • Interfaces with:
      • Forward Attendant Panel (FAP)
      • In-Flight Entertainment System (IFE)
      • Aircraft Information Network System (AINS)
      • Landing Gear Control and Interface Unit (LGCIU)
      • Cabin Telephone Unit (CTU)
      • Centralised Maintenance Computer (CMC)

    Passenger Air-to-Ground Telephone/Fax System (PATS)

    • Enables passengers and cabin crew to send faxes via the aircraft Satellite Communication (SATCOM) system
    • Performance is equivalent to usual office fax machines
    • Interconnects with the Satellite Data Unit (SDU) for worldwide FAX service

    Decoder/Encoder Unit Type-A (DEU-A)

    • Interfaces with active DIR to control passenger-related systems
    • Interfaces with:
      • Passenger Service Units (PSU)
      • Lighted signs (FSB/NS/RTS)
      • PAX-call lights
      • Loudspeakers
      • Cabin lighting
    • Number of DEU-As depends on cabin layout, installation of optional systems, and aircraft type
    • Interconnected with DIRs through CIDS data bus

    Decoder/Encoder Unit Type-B (DEU-B)

    • Interfaces with active DIR and cabin-crew-related functions
    • Controls:
      • Area Call Panels (ACP)
      • Attendant Indication Panels (AIP)
      • Additional Attendant Panels (AAP)
      • Handsets
      • Emergency Power Supply Unit (EPSU)
      • Slide/door pressure sensors
      • Drain mast heating monitoring

    CIDS Cabin Layout Selection

    • Allows cabin layout reconfiguration through software database changes
    • No hardware changes required
    • Protected by access code and only available on the ground

    Cabin Programming

    • Allows configuration of cabin zones through a dedicated programming page on the FAP
    • Available on ground or in flight
    • Protected by access code

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    Description

    This quiz covers the Decoder/Encoder Unit Type-A (DEU-A) in aircraft systems, focusing on its interface with active Directional Intelligence (DIR) and control of passenger-related systems. Learn about the inputs/outputs required and systems controlled by DEU-A.

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