Navigation

Question 1

What does the IRS ON BAT light indicate on the overhead maintenance panel?

Answer 1

IRS operating on backup electrical power from the APU HOT BATTERY BUS

Question 2

When is full alignment of the IRS required?

Answer 2

When the time from the last full alignment to the next expected arrival time exceeds 18 hours.

Question 3

What CDU pages are available during Alternate Navigation?

Answer 3

-Alternate navigation LEGS
-Alternate navigation PROGRESS
-Alternate navigation RADIO

Question 4

Can clear air turbulence be sensed by weather radar?

Answer 4

NO, turbulence can only be sensed when there’s sufficient precipitation.

Question 5

How many FMCs are provided?

Answer 5

Two FMCs (L and R)

Question 6

What factor determines ECON speed?

Answer 6

Cost Index (CI)

Question 7

What VNAV Pitch mode would you expect at arrow #3 and arrow #4 with climb via clearance?

Answer 7

3 VNAV SPD

#4 VNAV PATH

Question 8

If you’re flying an approach with the FMC in “on approach” logic and the airplane rises more than 150 feet above the path, the FMA pitch mode will change from VNAV PTH to what pitch mode?

Answer 8

VNAV SPD

Question 9

With the -400F Legacy FMC, when does the approach phase of the FMS start, also known as “on approach logic”

Answer 9

• when initial fix of an approach sequences
  -when the runway is the active waypoint within 25NM

Question 10

NG FMC “on approach” logic occurs under any of the following conditions (4)

Answer 10

-Descent phase flaps out of up

• First waypoint sequences of active NAV database
• aircraft less than 12NM from destination airport direct, or intercept curse to active waypoint and a manually entered EOD constraint is lower than destination airport plus 500 ft.
• the runway or missed approach point is the active waypoint and the airplane is within 25NM of the runway

Question 11

Are there VMCG issues when applying additional thrust manually during an assumed temperature thrust takeoff?

Answer 11

No, because the assumed temperature thrust setting is not considered a limitation and VMCG is calculated from the full engine rated thrust.

Question 12

What could happen if you advance the thrust levers further than TO1 or TO2 fixed derate following an engine failure?

Answer 12

Loss of directional control.

Question 13

When does the CDU message INSUFFICIENT FUEL display?

Answer 13

Estimated fuel at destination is less than fuel reserver (FMC RSV) entered on perf init page.

Question 14

Can ATC monitor airplane position on the ground when the transponder is in STBY ?

Answer 14

NO

Question 15

Are LNAV and VNAV available in alternate navigation?

Answer 15

NO

Question 16

What happens when an active database expires in flight?

Answer 16

The expired database is used until the active database is changed after landing

Question 17

How is the reference thrust changed from TO (DTO, TO1, TO2) to CON on the upper EICAS following an engine failure in flight? (3)

Answer 17

-Automatically when airspeed exceeds VREF+98 and flap are up

• Pushing the THR switch on the MCP changes thrust limit to CON

-Accessing THRUST LIM page in DCUD and manually selecting CON

Question 18

What databases are contained in the FMC?

Answer 18

• Aero Engine (AEDB-performance)
• NAVIGATION
• Operational Program Configuration (OPC)
  -MAGVAR Tables

Question 19

When will the FMC fail to sequence the active waypoint?

Answer 19

When more than 21NM from the active route and not on an offset route?

Question 20

On the 747-8, what modes of operation are available for the MultiScan weather radar?

Answer 20

Manual mode - operates like traditional radar with full control over tilt and gain

Automatic mode - collects data from multiple scans and merges information into a total weather picture

Question 21

On the 747-8, does the MultiScan weather radar provide turbulence detection capability?

Answer 21

YES - displays magenta for moderate to severe turbulence when there is sufficient precipitation (clear air turbulence can no be sensed by the radar)

Question 22

When armed for takeoff when does NVAV activate?

Answer 22

400 feet

Question 23

If the FMC cruise altitude is FL250 and the clearance altitude of FL190 is set in the MCP, what pitch mode FMA will display when FL190 is captured?

Answer 23

VNAV ALT

Question 24

What NVAV FMA would display on the PFD during departure waypoint altitude constraints?

Answer 24

VNAV PATH

Question 25

What is the difference between RNP and ACTUAL and where is it displayed?

Answer 25

RNP is required navigation performance
ACTUAL is actual navigation performance

Displayed on FMC POS REF PAGE

Question 26

What is a conditional waypoint?

Answer 26

A conditional waypoint is based on a time or altitude requirement and not a land reference.

“when reaching 500 ft”