Ch.11 (Flight Management/ Navigation)

Question 1

How/when does the FMC receive DME updating?

Answer 1

Only when manually selected on the FMC NAV OPTIONS page

Question 2

When the tuned frequency (no decoded name) remains visible on the PFD or ND or shows an incorrect identifier, how do you verify the station identity?

Answer 2

Through the audible morse code identifier

Question 3

What does a flashing ALIGN light (white) on the IRS panel during preflight indicate?

Answer 3

Unable to align due to: No position, Unreasonable position entry or a significant difference between previous position and entered position

Question 4

What does the FAULT light (amber) on the IRS mode selector unit indicate?

Answer 4

A detected fault affecting the related IRS ATT and or NAV modes

Question 5

What does the ON DC light (amber) illuminated in flight indicate?

Answer 5

If the related IRS is operating on DC power through the Switched Hot battery bus (AC power not normal)

Question 6

What does a single DC FAIL light (amber) illuminated in flight indicate?

Answer 6

DC power for the related IRS is not normal

Question 7

What will happen if both ON DC lights (amber) illuminate?

Answer 7

Power to the right IRS is terminated if AC power is not restored within 5 minutes

Question 8

IRS ground alignment at high latitudes may take how long?

Answer 8

May take up to 17 minutes

Question 9

When does IRS position and ground speed information become available?

Answer 9

Not until the IRS is aligned on the ground

Question 10

What does a GPS light (amber), illuminating during master caution recall and extinguishing when the master caution system is reset indicate?

Answer 10

Failure of a single GPS sensor

Question 11

With the FMC source select switch set to NORMAL, how are the FMCs controlling the CDUs and providing input to the autothrottle?

Answer 11

Left FMC is primary and controls the CDUs and provides input to the autothrottle. The right FMC operates in synchronization with the left FMC.

Question 12

How does moving the FMC source select switch to BOTH ON L or R affect LNAV and VNAV?

Answer 12

LNAV and VNAV will disengage

Question 13

What does an illuminated MCDU EXEC light indicate?

Answer 13

Active MCDU data has been modified but not executed

Question 14

What signifies mandatory data inputs on the MCDU?

Answer 14

Boxes signify mandatory data

Question 15

When is INSUFFICIENT FUEL on the CDU displayed?

Answer 15

When predicted fuel at destination will be 2000lbs or less

Question 16

What are the indications of a right FMC failure?

Answer 16

• FMC alert light and FMC message light will illuminate
• SINGLE FMC OPERATION displayed in both scratch pads
• VTK will display on right navigation display

Question 17

What are the indications of a left FMC failure?

Answer 17

• FMC alert light and FMC message light will illuminate
• SINGLE FMC OPERATION displayed in both scratch pads
• VTK will display on left navigation display

Question 18

What are the indications of a dual FMC failure?

Answer 18

• FMC alert light and FMC message light will illuminate
• SINGLE FMC OPERATION displayed in both scratch pads
• VTK will display on both navigation displays

Question 19

Define actual navigation performance (ANP) and required navigation performance (RNP)

Answer 19

• ANP: the FMC’s estimate of the quality of its position determination
• RNP: The navigation performance required during each phase of flight or during
  certain approaches

Question 20

When does LNAV engage, regardless of heading?

Answer 20

When laterally within 3nm of the active route leg

Question 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?

Answer 21

• Idle thrust with speed brakes retracted
• Descent windspeed decreasing with decreasing altitude unless forecast winds have been entered into FMC
• Applicable target speed

Question 22

When does VNAV PTH descent automatically revert to VNAV SPD?

Answer 22

When the following conditions exist:

• Limit speed Reversion
• Path Diversion
• No “TO” waypoint

Question 23

AT28R, BT28R, and CT28R are waypoints from what type of FMC procedure?

Answer 23

Engine out side

Question 24

When will BYPASS appear between two waypoints on the legs page?

Answer 24

When waypoints are too close and it is impossible for the aircraft to make the turn to capture a leg between two waypoints