Oral Bank - NAVIGATION

Question 1

What does the IRS ON battery (BAT) light indicate on the Overhead Maintenance Panel?

Answer 1

IRS operating on backup electrical power (APU hot battery bus)

Question 2

When is full alignment of the IRS required?

Answer 2

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

Question 3

What CDU pages are available during Alternate Navigation (3)

Answer 3

• Legs
• Progress
• Radio

Question 4

Can clear air turbulence be sensed by the weather radar?

Answer 4

No, only sensed when there is sufficient precipitation

Question 5

How many FMC’s are provided?

Answer 5

2 (L and R)

Question 6

What factor determines ‘ECON’ speed?

Answer 6

Cost Index

Question 7

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

Answer 7

3 VNAV SPD

#4 VNAV PTH

Question 8

If you are flying an approach with the FMC in ‘on approach’ and the airplane rises more than 150’ above the path, the FMA pitch mode will change from VNAV PTH to what pitch mode display?

Answer 8

VNAV SPD

Question 9

On a -400F Legacy FMC, when does the approach phase of the FMS start, also known as ‘on approach logic’? (2)

Answer 9

• When the initial fix of an approach sequences
• When the runway is the active waypoint and 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 sequenced of active nav database
• A/C less than 12nm from destination airport direct-to or intercept course-to active waypoint and a manually entered end of descent altitude constraint is lower than the destination airport plus 500’
  -The runway or missed approach point is the active waypoint and the airplane is within 25nm of the runway

Question 11

Are the VMCG issues when applying additional thrust manually during an assumed temperature thrust T/O?

Answer 11

No, because the assumed temp 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 then TO1 or TO2 fixed derate following and engine failure?

Answer 12

Loss of direction control

Question 13

When does the CDU message INSUFFICIENT FUEL display?

Answer 13

Fuel at destination is less than FMC RSV (entered on the 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 alternation navigation?

Answer 15

No

Question 16

What happens when an active database expires in flight?

Answer 16

Expired database is used until the active date is changed on the ground

Question 17

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

Answer 17

• Automatically when airspeed exceeds VREF +98 and flaps are up
• Pushing the THR switch on the MCP
• Accessing THRUST LIM page in CDU and selecting CON

Question 18

What databases are contained in the FMC? (4)

Answer 18

• Aero Engine
• Navigation
• Operational Program Configuration
• MAGVAR Tables

Question 19

When will the FMC fail to sequence the active waypoint?

Answer 19

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? (2)

Answer 20

• Manual
• Automatic

Question 21

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

Answer 21

Yes, displays magenta for mod-sev turbulence when there is sufficient precipitation (CAT cannot be sensed by the radar)

Question 22

When armed for T/O, when does VNAV activate?

Answer 22

400’

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

Answer 24

VNAV PTH

Question 25

What’s is the difference between RNP and ACTUAL? Where is it displayed?

Answer 25

• RNP is required navigation performance
• ACTUAL is the Actual Navigation Performance
• Displayed on the FMC POS REF page)

Question 26

What is a conditional waypoint?

Answer 26

Waypoint based on a time or altitude requirement, and not based on a land reference.