Aircraft Instrument Panel
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Questions and Answers

Where is the ISIS unit located?

  • On the lower deck avionics bay
  • On the overhead panel
  • On the upper deck avionics bay
  • On the main instrument panel (correct)

    • What is the function of the MMR subsystem?

  • To provide air data indications
  • To provide navigation data using GPS and ILS (correct)
  • To display maintenance pages
  • To tune navigation frequencies automatically

    • What is the power supply voltage for the MMR?

  • 230VAC
  • 115VAC (correct)
  • 24VDC
  • 28VDC

    • Where is the VOR/Marker receiver located?

    <p>On the upper deck avionics bay</p> Signup and view all the answers

    What is the function of the VOR subsystem?

    <p>To provide azimut orientation to a VOR ground station</p> Signup and view all the answers

    What is the function of the Marker subsystem?

    <p>To provide indication about the passage of the aircraft over the marker beacon transmitters</p> Signup and view all the answers

    How many receivers are in the VOR/Marker architecture?

    <p>2</p> Signup and view all the answers

    Which system uses ground stations to compute deviations?

    <p>ILS</p> Signup and view all the answers

    Where is the GADIRS unit located?

    <p>Avionics bay</p> Signup and view all the answers

    What is the primary function of the ADR?

    <p>To compute and provide air data</p> Signup and view all the answers

    What is the purpose of the IR FAST ALIGNEMENT process?

    <p>To initialize the inertial reference system</p> Signup and view all the answers

    What type of power supply is used for the MFP module?

    <p>115VAC and 28VDC</p> Signup and view all the answers

    What is the purpose of the internal monitoring function in the ADR?

    <p>To compare air data with other systems</p> Signup and view all the answers

    What is the function of the FRPA in the GADIRU 3?

    <p>To provide civil GPS data</p> Signup and view all the answers

    What is the purpose of the external monitoring function in the ADR?

    <p>Performed by PRIM and FWS</p> Signup and view all the answers

    What is the purpose of the Hybridization function in the ADR?

    <p>To fuse the measurement from different sources</p> Signup and view all the answers

    Where is the TACAN 1 indicator located?

    <p>Lower left</p> Signup and view all the answers

    What is the function of the Radio Altimeter?

    <p>To provide altitude information to the CDS and HUDS</p> Signup and view all the answers

    How many antenna are used by the Radio Altimeter?

    <p>4</p> Signup and view all the answers

    What is the location of the RA transceiver 1 in emergency mode?

    <p>Left side</p> Signup and view all the answers

    What is the power supply voltage for the Transceiver 1 and 2?

    <p>1100VU</p> Signup and view all the answers

    What happens when the RA override switch is turned to OFF?

    <p>RA emissions are inhibited</p> Signup and view all the answers

    What is the function of the MMRP?

    <p>To provide high-resolution ground map image display</p> Signup and view all the answers

    What happens when the VOR/DME/MMR/ADF test p/b is pressed for more than 3 seconds?

    <p>The system performs a self-test</p> Signup and view all the answers

    Where is the Standby compass located?

    <p>on the overhead panel, on the top of windshield centre post</p> Signup and view all the answers

    What is the power supply voltage for the MMR?

    <p>115VAC</p> Signup and view all the answers

    Where is the MMR 1 located?

    <p>lower deck avionics bay</p> Signup and view all the answers

    What is the voltage of the power supply for the VOR/Marker receiver?

    <p>110VAC</p> Signup and view all the answers

    Where is the VOR/Marker receiver located?

    <p>upper deck avionics bay</p> Signup and view all the answers

    What is the location of the standby static?

    <p>left and right</p> Signup and view all the answers

    Where is the ISIS unit located?

    <p>main instrument panel</p> Signup and view all the answers

    What is the location of the standby pitot?

    <p>right</p> Signup and view all the answers

    Where is the Transceiver 1 located?

    <p>1100VU</p> Signup and view all the answers

    What is the power supply voltage for the ISU 1 and 2?

    <p>1000VU</p> Signup and view all the answers

    Where is the RA transceiver 2 located in emergency mode?

    <p>Right side</p> Signup and view all the answers

    What is the location of the MMRP?

    <p>1100VU</p> Signup and view all the answers

    Where are the antenna 1 and 3 located?

    <p>Top area</p> Signup and view all the answers

    What is the power supply voltage for the Transceiver 1 and 2?

    <p>1800VU</p> Signup and view all the answers

    Where are the antenna 2 and 4 located?

    <p>Bottom area</p> Signup and view all the answers

    Where is the RA transceiver 1 located in emergency mode?

    <p>Left side</p> Signup and view all the answers

    What is the location of the GADIRS unit?

    <p>Avionics bay</p> Signup and view all the answers

    What is the power supply voltage for the ISP module?

    <p>28VDC</p> Signup and view all the answers

    What is the power supply voltage for the MFP module?

    <p>115VAC for de-icing and 28VDC for electronics</p> Signup and view all the answers

    What is the power supply voltage for the SSA?

    <p>115VAC</p> Signup and view all the answers

    What type of power supply is used for the GADIRU?

    <p>Normal power supply</p> Signup and view all the answers

    What is the location of the FRPA and CRPAU?

    <p>Fairing center fuselage</p> Signup and view all the answers

    What is the function of the GADIRU 3?

    <p>Uses always FRPA and CRPAU</p> Signup and view all the answers

    What is the purpose of the backup power supply through the TDO relay?

    <p>To ensure backup power supply for 10s in case of DC ESS BUS lost</p> Signup and view all the answers

    Where is the TACAN 1 transceiver located?

    <p>On the top</p> Signup and view all the answers

    What supplies the RA transceiver 2?

    <p>SEPDC 2</p> Signup and view all the answers

    Where is the RA transceiver 1 located?

    <p>On the left side</p> Signup and view all the answers

    What supplies ISU 1?

    <p>SEPDC 1</p> Signup and view all the answers

    Where are the antenna 1 and 3 located?

    <p>On the top</p> Signup and view all the answers

    What supplies the MMRP?

    <p>SEPDC 1</p> Signup and view all the answers

    Where is the MMRP located?

    <p>At 1100VU</p> Signup and view all the answers

    What supplies the RA transceiver 1 in emergency mode?

    <p>EEPDC</p> Signup and view all the answers

    Where is the RA transceiver 2 located?

    <p>On the right side</p> Signup and view all the answers

    What supplies the ISU 1 and 2?

    <p>SEPDC 1 and 2</p> Signup and view all the answers

    Where is the Standby compass located?

    <p>Overhead panel, on the top of windshield centre post</p> Signup and view all the answers

    What is the power supply voltage for the MMR?

    <p>115 VAC</p> Signup and view all the answers

    Where is the VOR/Marker receiver located?

    <p>Upper deck avionics bay</p> Signup and view all the answers

    What is the power supply source for VOR/MKR 1 receiver?

    <p>AC EMERGENCY BUS</p> Signup and view all the answers

    Where is the ISIS unit located?

    <p>Main instrument panel</p> Signup and view all the answers

    What is the power supply voltage for the VOR/Marker receiver?

    <p>Not specified</p> Signup and view all the answers

    Where is the MMR 2 located?

    <p>Main avionics bays</p> Signup and view all the answers

    What is the power supply source for VOR/MKR 2 receiver?

    <p>SEPDC 2</p> Signup and view all the answers

    What power supply is used for DME interrogator 1?

    <p>SEPDC 1</p> Signup and view all the answers

    Where are the DME antennas located?

    <p>Bottom fuselage</p> Signup and view all the answers

    What is the power supply for ADF receiver?

    <p>SEPDC 1</p> Signup and view all the answers

    Where is the ADF receiver located?

    <p>Upper deck avionics bay</p> Signup and view all the answers

    What is the power supply voltage for DME interrogator 1?

    <p>1100VU</p> Signup and view all the answers

    How many antennas are used by the TACAN system?

    <p>4</p> Signup and view all the answers

    Study Notes

    ISIS (Integrated Standby Instrument System)

    • Location: main instrument panel
    • Functions: air data indications, standby navigation system
    • Computes and transmits air data and inertial reference
    • Connected to static/pitot probe

    Standby Compass

    • Location: overhead panel, top of windshield center post
    • Provides standby navigation system

    GADIRU (Global Air Data and Inertial Reference Unit)

    • Location: avionics bay
    • Functions: air data and inertial reference
    • Computes and provides air data and inertial reference
    • Receives and processes GPS data, accelerations, and angular rates
    • Normal power supply: 115VAC, backup power supply: 28VDC

    ARINC 429

    • Connection protocol used for air data probes, except OAT
    • Used for GPS data transmission

    OAT (Outside Air Temperature)

    • OAT1 connected to GADIRU 1/2
    • OAT2 connected to GADIRU 3
    • Provides outside air temperature data

    Radio Navigation System

    • Tuning and displays: auto FMS, manual FMS, CDS, RMP (Radio Management Panel)
    • RMP used as gateway for FMS
    • Radio navigation system uses VOR (VHF Omnidirectional Range) and TACAN (Tactical Air Navigation) signals

    VOR (VHF Omnidirectional Range)

    • Provides azimuth orientation to a VOR ground station
    • Receives and decodes bearing information from VOR signals
    • Provides magnetic bearing, selected course, and deviation
    • Installed with marker functions: IM (Inner Marker), MM (Middle Marker), OM (Outer Marker)

    TACAN (Tactical Air Navigation)

    • Provides bearing and distance information
    • Uses ground stations to compute deviations
    • Has no dedicated hardware controls, except for audio identifier

    Radio Altimeter (RA)

    • Provides RA height data to CDS and HUDS through ADCN (Air Data Computer)
    • Two RA transceivers, each with one transmitting and one receiving antenna
    • Power supply: 115VAC, emergency power supply available

    MMR (Multi-Mode Receiver)

    • Functions: ILS (Instrument Landing System), GPS (Global Positioning System), and MLS (Microwave Landing System)
    • Power supply: 115VAC
    • Location: lower deck avionics bay (MMR1) and main avionics bay (MMR2)
    • GPS antenna and MLS omni-directional antenna installed on the aircraft

    TCAS (Traffic Collision Avoidance System)

    • Part of the ISS (Integrated Surveillance System)
    • Provides air traffic surveillance and collision avoidance
    • Two ISU (Integrated Surveillance Unit) components

    Weather Radar (WXR)

    • Part of the ISS
    • Provides weather radar function
    • Uses ISU as gateway

    Military Functions

    • MMRP (Multi-Mode Radar Receiver) component
    • Military radar control panel
    • ISU component
    • Radar antenna assembly
    • Power supply: 115VAC
    • Location: 1100VU
    • Provides high-resolution ground map image display and air-to-air functionality

    Power Supplies

    • No emergency power supply:
      • Transceiver 1: 1100VU
      • Transceiver 2: 1800VU
      • Antenna 1 and 3 on top, antenna 2 and 4 on bottom
    • Emergency power supply:
      • RA transceiver 1 on left side and RA transceiver 2 on right side
      • Antennas in bottom area

    TACAN and Radio Altimeter

    • TACAN:
      • No dedicated hardware controls except for audio identifier in ACP
      • Indications: TACAN 1 lower left, TACAN 2 lower right
    • Radio Altimeter:
      • 2 RA transceivers (1 transmitting and 1 receiving antenna per receiver)
      • 4 antennas
      • Provides height data to CDS and HUDS through ADCN (IOM)
      • Data sent through direct link to FWS and AFS

    RA Interface and Controls

    • RA interface with ICPs:
      • Engine master lever
      • EMCOM and DASS silencing
      • RA override switch
    • RA override switch:
      • 2 positions: ON (works normally) and OFF (inhibited emissions according to EMCOM/DASS silencing command)
    • Military functions:
      • Power management: increase aircraft discretion regarding RF emissions
      • Jamming detection

    ISS, TCAS, TAWS, and WXR

    • ISS:
      • TCAS
      • TAWS
      • WXR
    • Main components:
      • 2 ISU
      • WXR antenna
      • 2 TCAS antennas
      • WXR control panel
    • Power supply:
      • ISU 1 and 2: 1000VU
    • Modes:
      • Normal mode: all functions delivered by ISU 1 (master)
      • Mixed mode: if 1 function is lost, functions shared between ISU 1 and ISU 2
      • Downgraded mode: TCAS failure or at least 2 faults in the system

    Weather Radar and TAWS

    • Weather Radar:
      • Single configuration: RTU 2 is a dummy RTU, enables stowage plugs from antenna drive unit and ISU
    • TAWS:
      • GPWS mode 5 active less than 1000 ft AGL and L/G down

    Military Radar and EVS

    • Military Radar:
      • Components: MMRP, Military radar control panel, ISU 1, and Radar antenna assembly
      • Power supply: MMRP - 1100VU
    • EVS:
      • Interconnection with other systems ensured by both HUDC
      • Detailed description:
        • External interfaces
        • Image automatic adjustment is continuously performed by EVS based on alignment parameter stored in HUD PMM
        • Data link with HUDC
      • Indications:
        • EVS FAULT: cannot provide video signal
        • EVS OVERHEAT: automatically removed when inner temperature returns to normal
        • EVS DEGRADED: misalignment corresponds to a lack of HUD alignment value and not to a physical misalignment of the sensor due to an external impact

    VOR/DME/MMR/ADF and ISIS

    • VOR/DME/MMR/ADF:
      • Location: ISIS on main instrument panel
      • Standby compass: on overhead panel, on top of windshield center post
      • Standby static: left and right
      • Standby pitot: right
    • ISIS:
      • Units: GADIRU 1 and 3 using ARINC 429
      • ISIS unit:
        • Air data indications:
          • Mach number visible above 0.5 and disappears below 0.45
        • Maintenance menu:
          • Maintenance Pages to display failures and ISIS configuration
          • Air Data Testing enables access to air data testing function

    Radio Navigation System

    • Tuning and displays:
      • 2 tuning: automatic and manual
      • Radio navigation system components:
        • RMP 1 and 2
        • FMS
        • CDS
        • RMPs (kccu)
    • RMP used as gateway for FMS

    MMR and GPS

    • MMR:
      • 2 functions:
        • Landing system (ILS MLS) uses ground stations which emit signals to compute deviations
        • Civil GPS (FMS) based on measures between A/C and satellites
      • Power supply: 115VAC
      • Location: MMR 1 - lower deck avionics bay, MMR 2 - main avionics bays
    • GPS:
      • Components: GADIRU 1, 2, and 3
      • Normal power supply: 4 main parts GADIRU
      • Architecture: Hybrid = Mil/Civ GPS + IR

    ADR and IR

    • ADR:
      • Computes and provides air data and inertial reference
      • Architecture: Hybrid = Mil/Civ GPS + IR
    • IR:
      • Measures accelerations: GPS and time
      • Part of hybrid system with GPS
      • Usescivil GPS (FRPA) and military GPS (CRPA) signals
      • Can switch automatically from FRPA to CRPA in case of jamming

    Power Supply

    • SEPDC 1 supplies TACAN 1
    • SEPDC 2 supplies TACAN 2
    • Transceiver 1 located at 1100VU, Transceiver 2 located at 1800VU
    • Antenna 1 and 3 on top, antenna 2 and 4 on bottom

    TACAN

    • Does not have dedicated hardware controls except for audio identifier control in ACP
    • Indicators: TACAN 1 lower left, TACAN 2 lower right
    • 2 RA transceivers, 4 antennas
    • RA height data sent to CDS and HUDS through ADCN (IOM) and FWS and AFS via direct link

    Radio Altimeter

    • 2 RA transceivers, 1 transmitting and 1 receiving antenna per receiver
    • RA height provided to CDS and HUDS through ADCN (IOM) and FWS and AFS via direct link
    • Power supply: EEPDC supplies RA transceiver 1, SEPDC 2 supplies RA transceiver 2
    • RA transceiver 1 located on left side, RA transceiver 2 located on right side, antennas at bottom

    ISS

    • Components: 2 ISU, WXR antenna, 2 TCAS antennas, WXR control panel
    • Power supply: PSM's ISU 1 supplied by SEPDC 1, WXR antenna supplied by PSM at 200 VDC
    • Location: ISU 1 and 2 situated at 1000VU
    • Normal mode: all functions delivered by ISU 1 (master), Mixed mode: if 1 function is lost, functions shared by ISU 2 master
    • Downgraded mode: TCAS failure or at least 2 faults, ISU selected for WXR function is master

    Weather Radar

    • In single configuration, RTU 2 is a dummy RTU that enables stowage plugs from antenna drive unit and ISU

    TAWS

    • GPWS mode 5 active less than 1000 ft AGL and L/G down

    Military Radar

    • Components: MMRP, Military radar control panel, ISU 1, Radar antenna assembly
    • Power supply: Military function = high-resolution ground map image display NTD, Air-to-air function
    • Location: MMRP located at 1100VU
    • Data interface with A/C systems performed through Ethernet using ISU as gateway

    EVS

    • Interconnection with other systems ensured by HUDC
    • Image automatic adjustment continuously performed by EVS based on alignment parameter stored in HUD PMM
    • External interfaces: data link with HUDC used
    • Controls and indications: EVS FAULT, EVS OVERHEAT, EVS DEGRADED

    ISIS

    • Location: main instrument panel
    • Standby compass on overhead panel, standby static on left and right, standby pitot on right
    • GADIRU 1&3 using ARINC 429 > ISIS
    • ISIS unit: detailed controls and indications
    • Air data indications: Mach number visible above 0.5 and disappears below 0.45
    • Maintenance menu: Maintenance Pages to display failures and ISIS configuration

    Radio Navigation System

    • 2 tuning: auto FMS/manual FMS CDS RMP
    • RMP 3 not used for navigation
    • In case of double FMC failure in manual mode, RMP will be the only means to tune
    • RMP used as gateway for FMC

    MMR

    • 2 functions: Landing system (ILS MLS) and Civil GPS (FMS)
    • Power supply: MMR1 supplied by EEPDC at 115 VAC, MMR2 supplied by SEPDC 2 at 115 VAC
    • Location: MMR 1 in lower deck avionics bay at 1300VU, MMR 2 in main avionics bays at 1200VU
    • 2 GPS antennas, 1 MLS omni-directional at front top, MLS landing antenna at lower part of nose fuselage

    VOR/DME/MMR/ADF

    • VOR provides azimuth orientation to a VOR ground station
    • Marker provides indication about the passage of the aircraft over the marker beacon transmitters
    • VOR receives, decodes, and processes bearing information from VOR signals
    • Provides magnetic bearing, selected course and deviation, and audio signal (Morse)
    • Marker installed: IM at runway threshold, MM at 0.6 NM from runway threshold, OM at 4 NM from runway threshold
    • Architecture: 2 receivers, 1 common VOR semi-ant connected to each side of VOR receivers, 1 marker antenna connected only to receiver 1
    • Power supply: AC EMERGENCY BUS supplies VOR/MKR 1 receiver, SEPDC 2 supplies VOR/MKR 2 receiver
    • Location: VOR/Marker receiver on upper deck avionics bay (1100 and 1200VU)

    DME

    • Provides digital readout of slant distance and audio signal
    • Components: 2 interrogators, 2 antennas
    • Power supply: to cut both DME power supply = MMMS or ICPs command
    • DME interrogator 1 located at 1100VU, DME interrogator 2 located at 1200VU
    • Antennas at bottom fuselage, SEPDC 1 supplies DME 1 interrogator, SEPDC 2 supplies DME 2 interrogator
    • In order to prevent mutual interference of L band suppression bus equipment and ensure RF interoperability, each DME connected to iff1/2, Tacan1/2, DASS, MIDS, ISU1

    ADF

    • Provides indication of relating bearing and aural identification
    • 1 antenna and 1 receiver
    • Power supply no emergency: SEPDC 1 supplies ADF receiver
    • Location: receiver in upper deck avionics bay situated at 1000VU
    • Antenna at bottom fuselage
    • Controls and indications: on NTD and FMD

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    Description

    This quiz covers the location and functions of various instruments in an aircraft, including the ISIS unit, standby compass, and air data indications.

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