Flashcards in REVIEW QUESTIONS – FLIGHT MANAGEMENT, NAVIGATION Deck (24)
1. How/when does the FMC receive DME updating?
-The FMC auto tunes 2 scanning DME systems. DME updating is defaulted to OFF
2. When the tuned frequency (no decoded name) remain visible on the PFD or ND or shows an incorrect identifier, how do you verify the station identity?
-Identify the station via audio Morse Code
3. What does a flashing ALIGN light (white) on the IRS panel during preflight indicate?
-either significant difference between previous and entered position, an unreasonable present position entry, or no present position entry
4. What does the FAULT light (amber) on the IRS Mode Selector Unit Indicate?
-a fault in the related IRS ATT and/or NAV modes
5. What does an ON DC light (amber) illuminated in flight indicate?
-The IRS is operating on DC power from the switched Hot Battery Bus
6. What does a single DC FAIL light (amber) illuminated in flight indicate?
-DC power for the related IRS is not normal, if no other lights, the IRS is operating on normal AC power
7. What will happen if both ON DC lights (amber) illuminate?
-back up power to the right IRS is terminated if AC power is not restored within 5 minutes
8. IRS ground alignment at high latitudes may take how long?
-5 to 17 minutes
9. When does IRS position and ground speed information become available?
-not until the IRS is aligned on the ground
10. What does a GPS light (amber), illuminating during Master Caution Recall and extinguishing when the Master Caution System is reset, indicate?
-the failure of a single GPS sensor
11. With the FMC Source Select Switch set to NORMAL, how are the FMCs controlling the CDUs and providing input to the autothrottle?
-The left FMC is primary, and provides the autothrottle input and controls the CDU
12. How does moving the FMC source select switch to BOTH ON L or R affect LNAV and VNAV?
-selected FMC controls both sides, you see an FMC L or R on opposite map, and LNAV/VNAV will disengage when the selector switch is moved
13. What does an illuminated MCDU EXEC light indicate?
-to execute a change in the modified data
14. What signifies mandatory data inputs on the MCDU?
-Boxes where the data goes
15. when is INSUFFICIENT FUEL on the CDU displayed?
-if predicted fuel at the destination will be 2000 lbs or less
16. What are the indications of a right FMC failure?
-FMC alert light and FMC message will illuminate, SINGLE FMC OPERATION will be in both scratch pads, VTK flag on the right display, LNAV/VNAV will disengage if on auto pilot B, and after 25-30 seconds the right nav display will display failure information
17. What are the indications of a left FMC failure?
-FMC alert light, the MENU page will appear on both CDUs, VTK flag on left display, LNAV/VNAV will disengage, and after 25-30 seconds the left nav display will display failure information
18. What are the indications of a dual FMC failure?
-FMC alert light, the MENU page will appear on both CDUs, VTK flag on both displays, LNAV/VNAV will disengage, and after 25-30 seconds both nav displays will display failure information
19. Define Actual Navigation Performance (ANP) and Required Navigation Performance (RNP).
-ANP- is the FMC’s estimate of the quality of its position determination
-RNP - the required accuracy of the navigation capabilities of the aircraft
20. When does LNAV engage, regardless of heading?
-when laterally within 3 nm of the active leg
21. The descent path starts at the calculated top of descent (T/D) point and includes waypoint altitude restrictions. The path is based on what parameters?
-idle thrust, speedbrakes retracted, descent wind speed decreasing with decreasing altitude, and applicable target speed.
22. When does VNAV PTH descent automatically revert to VNAV SPD?
-overspeed reversion, path diversion (aircraft is more than 200’ above the path), or if there is no “TO” waypoint (you are on a vector)
23. AT28R, BT28R, and CT28R are waypoints from what type of FMC procedure?