B777 Flight Management, Navigation

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  • 1/37 Questions

    Which of the following are data sources for the ADIRU?

    • Static ports only
    • Air data modules, AOA sensors, and TAT probe
    • Air data modules only
    • AOA sensors and TAT probe only
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B777 Flight Management, Navigation - Quiz
About This Quiz

This quiz focuses on the Flight Management and Navigation of the Boeing 777, assessing knowledge on ADIRU operations, system alignments, and navigation data inputs. It's designed for aviation professionals and students to understand critical systems for safe and efficient flight operations.

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  • 2. 

    How long should the ADIRU switch remain off when manually realigning the ADIRU?

    • Momentarily

    • 24 seconds

    • 45 seconds

    • 30 seconds

    Correct Answer
    A. 30 seconds
    Explanation
    When manually realigning the ADIRU (Air Data Inertial Reference Unit), the ADIRU switch should remain off for 30 seconds. This duration allows the unit to reset and recalibrate its sensors properly. Momentarily (a very short duration) is not sufficient for the ADIRU to complete the realignment process. 24 seconds and 45 seconds are not the correct durations specified for this procedure.

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  • 3. 

    What happens if the ADIRU switch is left on and then primary power is removed fropm the airplane and the BATTERY switch is turned off?

    • The ON BAT light illuminates and the EICAS memo message ADIRU ON BAT displays.

    • The ON BAT light illuminates and the ground crew call horn sounds.

    • The ON BAT light extiguishes when the BATTERY switch is turned off.

    • Nothing. The ADIRU switch is always left on when securing the airplane.

    Correct Answer
    A. The ON BAT light illuminates and the ground crew call horn sounds.
    Explanation
    When the ADIRU switch is left on and primary power is removed from the airplane, and then the BATTERY switch is turned off, the ON BAT light illuminates and the ground crew call horn sounds. This indicates that the ADIRU is still receiving power from the battery, and it serves as a warning to the ground crew that the ADIRU is still active.

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  • 4. 

    What is the maximum range at which turbulence returns can be displayed?

    • 10nm

    • 20nm

    • 40nm

    • 80nm

    Correct Answer
    A. 40nm
    Explanation
    The maximum range at which turbulence returns can be displayed is 40nm. This means that the system is capable of showing turbulence data up to a distance of 40 nautical miles from the aircraft.

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  • 5. 

    Which message is displayed when the ADIRU is in the alignment mode?

    • EICAS alert message NAV ADIRU INERTIAL

    • EICAS memo message ADIRU ALIGN MODE

    • CDU scratchpad message ADIRU ALIGN

    • CDU scratchpad message ENTER ADIRU POSITION

    Correct Answer
    A. EICAS memo message ADIRU ALIGN MODE
    Explanation
    When the ADIRU (Air Data Inertial Reference Unit) is in the alignment mode, the EICAS (Engine Indicating and Crew Alerting System) displays a memo message stating "ADIRU ALIGN MODE". This message informs the crew that the ADIRU is currently aligning itself and calibrating its inertial reference system.

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  • 6. 

    What is represented by the color magenta in weather radar returns?

    • Turbulence within precipitation

    • Heavy precipitation

    • Moderate precipitaiton

    • Clear air turbulence

    Correct Answer
    A. Turbulence within precipitation
    Explanation
    The color magenta in weather radar returns represents turbulence within precipitation. This means that areas with magenta color on the radar indicate that there is turbulence occurring within a region where precipitation is present. This information is important for pilots and meteorologists as it helps them identify areas of potential turbulence and plan accordingly for safe travel or forecast weather conditions.

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  • 7. 

    What is the altitude source for transponder altitude reporting when the ALT SOURCE selector is in the ALTN position?

    • ADIRU

    • Air data modules

    • The master FMC

    • SAARU

    Correct Answer
    A. SAARU
    Explanation
    When the ALT SOURCE selector is in the ALTN position, the altitude source for transponder altitude reporting is SAARU.

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  • 8. 

    What color is the ADF frequency data on the NAV RADIO page?

    • Magenta

    • Cyan

    • Green

    • White

    Correct Answer
    A. Cyan
    Explanation
    The ADF frequency data on the NAV RADIO page is displayed in cyan.

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  • 9. 

    What color is the VOR data on the NAV RADIO page?

    • Magenta

    • Cyan

    • Green

    • White

    Correct Answer
    A. Green
    Explanation
    The VOR data on the NAV RADIO page is displayed in green.

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  • 10. 

    Which of the following will not cause the EICAS message FMC to be displayed?

    • CDU is selected on the instrument Source selector.

    • The FMC selector is in the L position with the left FMC failed.

    • The FMC selector is in the R position with the right FMC failed.

    • Both FMCs have failed

    Correct Answer
    A. CDU is selected on the instrument Source selector.
    Explanation
    The EICAS message FMC will not be displayed when the CDU (Control Display Unit) is selected on the instrument Source selector. The CDU is a separate unit used for inputting data into the Flight Management Computer (FMC). Therefore, selecting the CDU on the instrument Source selector does not cause the FMC message to be displayed.

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  • 11. 

    Which one of the following is inoperative with dual FMC failure?

    • LNAV

    • VNAV

    • MAP display

    • Both CDUs

    Correct Answer
    A. VNAV
    Explanation
    With dual FMC failure, the Vertical Navigation (VNAV) function becomes inoperative. The VNAV function is responsible for providing vertical guidance during the flight, including the calculation of climb and descent profiles. Without the FMC, which controls the VNAV function, the aircraft would not be able to accurately navigate and maintain the desired vertical path. Therefore, the VNAV function is inoperative in this situation.

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  • 12. 

    What is the altitude source for transponder altitude reporting when the ALT SOURCE selector is in the NORM position?

    • ADIRU

    • SAARU

    • Air data modules

    • The master FMC

    Correct Answer
    A. ADIRU
    Explanation
    When the ALT SOURCE selector is in the NORM position, the altitude source for transponder altitude reporting is the ADIRU (Air Data Inertial Reference Unit). The ADIRU is responsible for providing accurate altitude information to the transponder, which is then transmitted to air traffic control and other aircraft. The ADIRU combines data from various sensors, such as the pitot-static system and inertial reference system, to calculate the aircraft's altitude. Therefore, when the ALT SOURCE selector is in the NORM position, the ADIRU is the source of altitude information for transponder reporting.

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  • 13. 

    Which statement about the ADIRU is correct?

    • The inertial reference position is updated using information from the air data modules.

    • The ADIRU sends magnetic variation data to the FMCs to convert true heading ti magenetic heading.

    • The ADIRU recieves the same data inputs as the SAARU but compares and validates the data independently.

    • If the ADIRU fails, The PFDs will blank.

    Correct Answer
    A. The ADIRU recieves the same data inputs as the SAARU but compares and validates the data independently.
    Explanation
    The ADIRU receives the same data inputs as the SAARU but compares and validates the data independently. This means that both systems receive the same information, but the ADIRU checks and verifies the data on its own. This is important for redundancy and ensuring the accuracy of the information provided to the aircraft's systems.

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  • 14. 

    Which of the following actions does not begin an early VNAV descent?

    • Selecting the DES NOW prompt on the DES page.

    • Selecting a lower altitude in the MCP altitude window in response to the CDU scratchpad message RESET MCP ALTITUDE.

    • Selecting a lower altitude in the MCP altitude window and pushing the MCP altitude selector when less than 50NM from the T/D

    Correct Answer
    A. Selecting a lower altitude in the MCP altitude window in response to the CDU scratchpad message RESET MCP ALTITUDE.
    Explanation
    The action of selecting a lower altitude in the MCP altitude window in response to the CDU scratchpad message RESET MCP ALTITUDE does not begin an early VNAV descent. This action is a response to a message on the CDU scratchpad and does not involve initiating a descent. The other actions mentioned, such as selecting the DES NOW prompt on the DES page and selecting a lower altitude in the MCP altitude window and pushing the MCP altitude selector when less than 50NM from the T/D, are all actions that initiate an early VNAV descent.

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  • 15. 

    Which of theWhat does following ND modes can display weather radar returns?

    • APP centerd

    • MAP centered

    • VOR centered

    • PLAN

    Correct Answer
    A. MAP centered
    Explanation
    MAP centered mode can display weather radar returns.

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  • 16. 

    Which one of the following pages is available following dual FMC failure?

    • ALTN PERF INIT

    • ALTN REF NAV DATA

    • ALTN POS REF

    • ALTN NAV LEGS

    Correct Answer
    A. ALTN NAV LEGS
    Explanation
    The ALTN NAV LEGS page is available following dual FMC failure. This page allows the pilot to input and review the alternate navigation legs, which are the flight path and waypoints to be followed in case of a diversion or alternate route. It is important to have this information available in case of FMC failure to ensure proper navigation and safe flight operations.

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  • 17. 

    How often is a complete ADIRU alignment recommended?

    • Every 15 hours

    • Every 24 hours

    • Whenever the total time in the navigation mode is expected to exceed 15 hours.

    • Whenever tha total time in the navigation mode is expected to exceed 24 hours.

    Correct Answer
    A. Whenever tha total time in the navigation mode is expected to exceed 24 hours.
    Explanation
    A complete ADIRU alignment is recommended whenever the total time in the navigation mode is expected to exceed 24 hours. This means that after 24 hours of continuous navigation mode usage, it is advisable to perform a complete ADIRU alignment to ensure accurate and reliable navigation data. This helps maintain the integrity and precision of aircraft navigation systems, ensuring safe and efficient flight operations.

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  • 18. 

    Which of the following are data sources for the SAARU?

    • Air data modules only

    • Static ports only

    • Air data modules, AOA sensors, and TAT probe

    • AOA sensors and TAT probe only

    Correct Answer
    A. Air data modules, AOA sensors, and TAT probe
    Explanation
    The SAARU (System for Aircraft Accident Analysis and Reporting Unit) collects data from various sources to analyze and report aircraft accidents. The correct answer states that the data sources for the SAARU include air data modules, AOA (Angle of Attack) sensors, and TAT (Total Air Temperature) probe. These sources provide crucial information about the aircraft's airspeed, angle of attack, and temperature, which are essential for accident analysis and reporting.

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  • 19. 

    When will the FMC not automatically sequence the active waypoint in flight?

    • When more than 21 NM off the active route and not on an offset.

    • When more than 2.5 NM off the active route and not on an offset.

    • When passing over the waypoint in HDG SEL.

    • When passing over the PROCEDURE HOLD waypoint on an approach.

    Correct Answer
    A. When more than 21 NM off the active route and not on an offset.
    Explanation
    When the aircraft is more than 21 NM off the active route and not on an offset, the FMC will not automatically sequence the active waypoint in flight. This means that the FMC will not automatically proceed to the next waypoint in the flight plan when the aircraft reaches the current active waypoint. Instead, the pilot will need to manually select and activate the next waypoint. This is likely done to prevent the aircraft from deviating too far off course without pilot intervention.

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  • 20. 

    What does the EICAS message SGL SOURCE ILS indicate?

    • Both PFDs and NDs are using the same source of ILS information

    • Only one ILS receiver is tuned

    • Both PFDs and NDs are using the same source of air data information

    • A single source of display information is used by some or all display units

    Correct Answer
    A. Both PFDs and NDs are using the same source of ILS information
    Explanation
    This EICAS message indicates that both Primary Flight Displays (PFDs) and Navigation Displays (NDs) are receiving the Instrument Landing System (ILS) information from the same source. This means that the ILS receiver is tuned to a single frequency and both displays are using that information for navigation and guidance.

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  • 21. 

    When electrical power is interrupted and returns and the FMC restarts, which of the following actions must be performed?

    • The active waypoint must be entered on LEGS page 1, line 1 and the desired course to that waypoint also selected before LNAV can be activated

    • The previously active route automatically remains the active route

    • The masted FMC (left or right) must be selected and initialized on the FMC selector

    • Performance data entry is not required, it is retained in temporary memory

    Correct Answer
    A. The active waypoint must be entered on LEGS page 1, line 1 and the desired course to that waypoint also selected before LNAV can be activated
    Explanation
    After an interruption in electrical power and the restart of the FMC, the active waypoint must be entered on LEGS page 1, line 1. Additionally, the desired course to that waypoint must also be selected before LNAV can be activated. This ensures that the aircraft can navigate accurately along the desired route. The other options, such as the previously active route remaining active, selecting and initializing the masted FMC, and retaining performance data, are not necessary for the activation of LNAV in this situation.

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  • 22. 

    Which of the following statements about waypoint altitude constraints is not correct?

    • The active altitude constraint is displayed on line 1 of the LEGS page.

    • The active altitude constraint is displayed in magenta.

    • The active altitude constraint is displayed on the ND map.

    • The Active altitude constraint can be displayed on the CLB, CRZ and DES pages.

    Correct Answer
    A. The active altitude constraint is displayed on line 1 of the LEGS page.
    Explanation
    The correct answer is that the active altitude constraint is displayed on line 1 of the LEGS page.

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  • 23. 

    When can the active navigtion database be changed on the IDENT page?

    • Only during preflight

    • Only on the ground

    • Any time, on the ground or in flight

    • Only during preflight before entry of the ORIGN

    Correct Answer
    A. Only on the ground
    Explanation
    The active navigation database can only be changed on the ground. This means that it cannot be changed during the flight or at any other time while the aircraft is in the air. Changing the navigation database is a preflight task that needs to be done before the aircraft takes off.

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  • 24. 

    The FMC scratchpad message TAKEOFF SPEEDS DELETED does not display for which of the following conditions?

    • A new ZFW is entered on the PERF INIT page

    • A new FLAPS setting is entered on the TAKEOFF REF page

    • A new CG value is entered on the TAKEOFF REF page

    • New runway winds are entered on the TAKEOFF REF page

    Correct Answer
    A. A new CG value is entered on the TAKEOFF REF page
    Explanation
    When a new CG value is entered on the TAKEOFF REF page, the FMC scratchpad message "TAKEOFF SPEEDS DELETED" will not display. This message is typically displayed when there are changes made to the aircraft's weight, flaps setting, or runway winds on the TAKEOFF REF page. However, changing the CG value does not affect the takeoff speeds calculation, so the message is not triggered in this case.

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  • 25. 

    What is the source of air data for the inegrated Standby Flight Display (ISFD)?

    • FMC

    • SAARU

    • ADIRU

    • A dedicated pilot static system and air data modules.

    Correct Answer
    A. A dedicated pilot static system and air data modules.
    Explanation
    The correct answer is a dedicated pilot static system and air data modules. The integrated Standby Flight Display (ISFD) relies on a dedicated pilot static system and air data modules to obtain air data. These components provide crucial information such as airspeed, altitude, and vertical speed to the ISFD, allowing it to accurately display flight information to the pilot. The FMC, SAARU, and ADIRU are not mentioned as sources of air data for the ISFD, making them incorrect options.

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  • 26. 

    What is the only FMC page that will accept entry of airways?

    • ACT RTE X, page 1

    • ACT RTE X, any page

    • ACT RTE X, page 2 and beyond

    • ACT RTE X LEGS, any page

    Correct Answer
    A. ACT RTE X, page 2 and beyond
    Explanation
    The correct answer is ACT RTE X, page 2 and beyond. This is because the FMC page ACT RTE X, page 2 and beyond allows for the entry of airways. The other options, such as ACT RTE X, page 1, ACT RTE X, any page, and ACT RTE X LEGS, any page, do not specifically mention the ability to enter airways. Therefore, they are not the correct answer.

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  • 27. 

    Which of the following actions does not activate the FMC descent phase?

    • Passing the T/D point in FLCH

    • Selecting the DES NOW prompt on the DES page.

    • Selecting a lower altitude in the MCP altitude window and pressing the MCP altitude selector when less than 50 NM from the T/D.

    • Selecting a lower altitude in the MCP altitude window and pressing the MCP altitude sector when more than 50 NM from the T/D.

    Correct Answer
    A. Selecting a lower altitude in the MCP altitude window and pressing the MCP altitude sector when more than 50 NM from the T/D.
    Explanation
    Selecting a lower altitude in the MCP altitude window and pressing the MCP altitude sector when more than 50 NM from the T/D does not activate the FMC descent phase. The FMC descent phase is activated by passing the T/D point in FLCH, selecting the DES NOW prompt on the DES page, and selecting a lower altitude in the MCP altitude window and pressing the MCP altitude selector when less than 50 NM from the T/D.

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  • 28. 

    The EXEC light is illuminated and you push the DEP ARR key but do not see desired destination ARRIVALS page. Which of the following actions will not display the DEP/ARR INDEX page?

    • Push the INTIT REF key and select the INDEX line select key (6L).

    • Push the ERASE Prompt line select key (6L) then push the INDEX line select key (6L).

    • Push the EXEC key then push the INDEX line select key (6L).

    • Wait until traveling more than 400 NM from the ORIGN or more than half way to the destination before selecting the DEP/ARR key again.

    Correct Answer
    A. Push the INTIT REF key and select the INDEX line select key (6L).
    Explanation
    Pushing the INTIT REF key and selecting the INDEX line select key (6L) will not display the DEP/ARR INDEX page.

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  • 29. 

    What does the WXR FAIL ANT fault message indicate?

    • Weather returns will still display.

    • Weather retrurns will not display correctly.

    • There is a problem with the radar antenna.

    • Weather returns will not display or weather returns will display, but will be unreliable.

    Correct Answer
    A. Weather returns will not display or weather returns will display, but will be unreliable.
    Explanation
    The WXR FAIL ANT fault message indicates that there is a problem with the radar antenna. As a result, weather returns will either not display at all or if they do display, they will be unreliable.

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  • 30. 

    Which of the following about the SET INERTIAL POS line on the POST INIT page is not correct?

    • A position can be entered at anytime on the ground.

    • A position must be entered before the ADIRU can enter the navigation mode.

    • A position entry is optional when the ADIRU is in the automatic relign mode.

    • A position entry is not possible when the airplane is moving.

    Correct Answer
    A. A position can be entered at anytime on the ground.
    Explanation
    The statement "A position can be entered at anytime on the ground" is not correct. A position must be entered before the ADIRU (Air Data Inertial Reference Unit) can enter the navigation mode. This means that the position entry cannot be done at any time on the ground, but it must be done before the ADIRU can start navigating.

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  • 31. 

    What is the data source for the standby attitude indicator?

    • ADIRU

    • FMC

    • SAARU

    • ADIRU OR FMC

    Correct Answer
    A. SAARU
    Explanation
    The correct answer is SAARU. The Standby Attitude Indicator is a backup instrument that provides attitude and heading information in case of primary instrument failure. SAARU, which stands for Standby Attitude and Air Data Reference Unit, is a separate system that provides data to the standby attitude indicator. It is designed to be independent of the primary ADIRU (Air Data Inertial Reference Unit) or FMC (Flight Management Computer) systems, ensuring redundancy and reliability in case of a failure in the primary sources.

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  • 32. 

    Which of the following statements about the FMC "on approuch" logic is not correct?

    • VNAV PTH remains displayed during a descent after airspeed intervention is selected.

    • VNAV continues to command a descent after the MCP altitude selection is set to atleast 300 feet above the current airplane altitude.

    • "On approach" logic requires the FMC be in the descent phase and the flaps out of UP.

    • A glide path angle must be included in the approach and displayed on the LEGS page.

    Correct Answer
    A. A glide path angle must be included in the approach and displayed on the LEGS page.
    Explanation
    The correct answer is that a glide path angle must be included in the approach and displayed on the LEGS page. This means that the FMC "on approach" logic does not require a specific glide path angle to be included in the approach and displayed on the LEGS page.

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  • 33. 

    What does the WXR FAIL R/T message indicate?

    • Weather returns will still display

    • Weather returns will not display correctly

    • The selected R/T has failed

    • Weather returns will not display or weather returns will display, but will be unreliable

    Correct Answer
    A. The selected R/T has failed
    Explanation
    The correct answer indicates that the selected R/T (receiver/transmitter) has failed. This means that there is an issue with the device responsible for receiving and transmitting weather returns. As a result, weather returns will not be displayed correctly or may not be displayed at all. This failure could lead to unreliable weather information being provided.

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  • 34. 

    Which of the following statements about FMC missed approach is not correct?

    • VNAV and LNAV can not be activated below 400 feet radio altitude.

    • Descent constrait altitudes below the current airplane altitude are deleted.

    • The highest altitude in the missed approach procedure becomes the new cruise altitude.

    • Automatic transition to the missed approach phase is not possible without pushing the TOGA switch.

    Correct Answer
    A. Automatic transition to the missed approach phase is not possible without pushing the TOGA switch.
    Explanation
    The automatic transition to the missed approach phase is possible without pushing the TOGA switch.

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  • 35. 

    When does LNAV automatically engage if selected during preflight?

    • At above 50 feet when within 5.5 NM laterally from the active route leg.

    • At or above 50 feet with an intercept heading to the active route leg.

    • Only at or above 50 Feet on the departure route active leg.

    • LNAV is already active during takeoff.

    Correct Answer
    A. At or above 50 feet with an intercept heading to the active route leg.
    Explanation
    LNAV (Lateral Navigation) typically engages automatically when the aircraft reaches or exceeds 50 feet AGL (Above Ground Level) and has established an intercept heading to the active route leg. This ensures that the aircraft is properly aligned with the intended flight path before LNAV guidance takes over.

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  • 36. 

    Which of the following statements about FMC fuel monitoring is not correct?

    • The FMC uses fuel quantity system values in flight.

    • The FMC uses calculated fuel values for performance.

    • During fuel jettison, the FMC calculated values are independant of the fuel quantity system values.

    • The FMC updates calculated values with fuel quantity system values regularly in flight and informs the crew when the differences are significant.

    Correct Answer
    A. The FMC uses calculated fuel values for performance.
    Explanation
    The FMC uses fuel quantity system values in flight, not calculated fuel values for performance.

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  • 37. 

    What is the source of attitude data for the Integrated Standby Flight Display (ISFD)?

    • ADIRU

    • An independent attitude source instead of the ISFD

    • SAARU

    • FMC

    Correct Answer
    A. SAARU
    Explanation
    The Integrated Standby Flight Display (ISFD) typically receives its attitude data from the Standby Attitude and Reference Unit (SAARU). The SAARU is an independent system that provides attitude and heading information in case of a failure in the primary flight instruments. It uses accelerometers and gyroscopes to sense the aircraft's orientation and provide a reliable backup for the pilot.

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Quiz Review Timeline (Updated): Jan 15, 2025 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Jan 15, 2025
    Quiz Edited by
    ProProfs Editorial Team
  • Feb 02, 2011
    Quiz Created by
    Gtd
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