Flight Management / Navigation Flashcards
How/when does the FMC receive DME updating?
Defaulted to OFF and must be manually selected on the FMC NAV OPTIONS page. / uses two different DMEs to determine location.
What does a flashing ALIGN light (white) on the IRS panel during preflight indicate?
Alignment cannot be completed due to IRS detection of significant difference between previous and entered positions or an unreasonable present position entry or no present position entry.
What does the FAULT light (amber) on the IRS Mode Selector Unit indicate?
System fault affecting the related IRS ATT and/or NAV modes has been detected.
What does an ON DC light (amber) illuminated in flight indicate?
Operating on DC power from the Switched Hot Battery Bus (AC power not normal).
What does a single DC FAIL light (amber) illuminated in flight indicate?
Indicates that DC power for the related IRS is not normal.
IRS ground alignment at high latitudes may take how long?
Up to 17 minutes.
When does IRS position and ground speed information become available?
When the IRS is aligned on the ground.
What does a GPS light (amber), illuminating during Master Caution Recall and extinguishing when the Master Caution System is reset, indicate?
Failure of a single GPS sensor.
With the FMC Source Select Switch set to NORMAL, how are the FMCs controlling the CDUs and providing input to the autothrottle.
Left FMC is primary and controls the CDUs and Autothrottle.
How does moving the FMC source select switch to BOTH ON L or R affect LNAV and VNAV?
Will disengage both LNAV or VNAV.
What does an illuminated MCDU EXEC light indicate?
Indicate that active data has been modified, but not executed.
What signifies mandatory data inputs on the MCDU?
Open boxes.
When is INSUFFICIENT FUEL on the CDU displayed?
Predicted fuel at destination will be 2000 lbs (900 kg) or less.
What are the indications of a right FMC failure?
The message SINGLE FMC OPERATION will be displayed in both scratchpads. VTK will display on the right navigation display.
What are the indications of a left FMC failure?
MENU page will appear on both CDUs. VTK will appear on the left navigation display.