Flight Management System/Navigation Atlas Flashcards
What happens when moving the Mode selector of the IRS from NAV to 0FF?
The align lights illuminate for 30 seconds as the system goes through a shutdown sequence
What lights should come on when the IRS Mode selector is moved from OFF to NAV?
The ON DC momentarily, then the ALIGN
How many IRS systems are installed on the B767?
Three
What is the normal way of inserting the position in the IRS?
Selecting the position on the POS INIT page of the FMC
What is the backup source of power for the left IRS?
The hot battery bus
With loss of all AC power, the IRS as will:
Continue “ON DC” for 5 minutes, the right IRU will drop off line after 5 minutes
What happens to the IRS when the Mode selector is moved from OFF to NAV?
Initiates levelling and alignment with true North
What page will appear on the CDU display when power is first applied during pre-flight?
IDENT
How does the FMC identify data needed by the system?
Dashes or boxes
The FMC CDU page “RTE” will list the flight route in clearance language OR detailed waypoint format?
Clearance language
How can a departure SID be entered into your route flight?
Using the departure page
How is present position updated to runway position when in a non-GPS aircraft?
Pressing the THR or EPR/N1 switch for takeoff aligns the aircraft to runway position
What function does the RANGE selector have in the MAP and PLAN mode?
Select the map range
Which of the following will always be displayed when the HSI is placed in the map mode?
Active route and tuned VOR and DME stations within the range selected
What additional information is displayed on the HSI when the NAVAID switch on the HSI Control Panel is on?
Location of Navaids in the database
What indicates a modification to the active route?
Dashed White line
What identifies the active waypoint?
Magenta waypoint symbol
What is the FMC database?
Information stored in the computer that is periodically updated
When will the SET IRS POS latitude and longitude display blank?
When all IRS’s enter the navigation mode
How does the CDU identify an invalid entry by a crewmember?
Message on the scratchpad line
How can you display the RTE2 page?
Press RTE 2 line select key
Which FMC route provides vertical and lateral navigation commands?
Route 1 or 2, which ever has been activated
Why must data be entered on the PERF INIT page?
To initialise the vertical navigation
What cost index should be entered if a maximum range speed is desired?
Zero
Where can speed and altitude restrictions at a waypoint be entered into the CDU?
On the legs page
Where can a change of routing be entered into the CDU?
LEGS or RTE page
Where do the AFDS lateral navigation commands originate when LNAV is engaged?
FMC
When LNAV is selected, within which distance from the active leg does the LNAV mode engage?
2.5 nautical miles
A white LNAV annunciation in the ADI indicate?
LNAV is armed
With an auto pilot in CMD, which of the following modes can be used to turn the aeroplane to an LNAV route intercept heading?
Heading select
How are the pilots automatically notified of an LNAV mode non-intercepting heading situation?
The display of the scratchpad message in the CDU’s
A green LNAV annunciation in the ADI indicates
LNAV is engaged
What pitch and thrust modes results from engaging VNAV?
The modes commanded by the FMC
What type of commands should the FMC be sending to the AFDS and auto throttle when the aircraft symbol reaches the point labelled “T/D” on the HSI?
Descend
In-flight, what CDU mode key would be used to display VREF?
Push INIT REF key
What does the DSPY light on the CDU indicate?
The CDU is displaying data not related to the active leg or speed schedule
How is the FMC navigation affected if DME/DME or VOR/DME updating is lost?
The FMC will navigate using IRS inputs only
What is indicated when boxes appear on the FUEL line of the CDU performance initialisation page?
The FMC is not receiving valid fuel quantity data
Can clear air turbulence be detected by weather radar?
Turbulence can only be detected when there is sufficient precipitation
What factor determines ECON speed?
Cost index
If you are flying and approach with the FMC in “on approach” logic, and the aeroplane rises significantly above the path, the FMA pitch mode will change from VNAV PTH to what pitch mode display?
VNAV SPD
