Oral Bank - NAVIGATION Flashcards
What does the IRS ON battery (BAT) light indicate on the Overhead Maintenance Panel?
IRS operating on backup electrical power (APU hot battery bus)
When is full alignment of the IRS required?
When time from last full alignment to the next expected arrival time exceeds 18hrs
What CDU pages are available during Alternate Navigation (3)
- Legs
- Progress
- Radio
Can clear air turbulence be sensed by the weather radar?
No, only sensed when there is sufficient precipitation
How many FMC’s are provided?
2 (L and R)
What factor determines ‘ECON’ speed?
Cost Index
What VNAV Pitch mode would you expect at arrow #3 and arrow #4 with a ‘climb via’ clearance?
3 VNAV SPD
#4 VNAV PTH
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?
VNAV SPD
On a -400F Legacy FMC, when does the approach phase of the FMS start, also known as ‘on approach logic’? (2)
- When the initial fix of an approach sequences
- When the runway is the active waypoint and within 25nm
NG FMC, ‘on approach’ logic occurs under any of the following conditions? (4)
- 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
Are the VMCG issues when applying additional thrust manually during an assumed temperature thrust T/O?
No, because the assumed temp thrust setting is not considered a limitation and VMCG is calculated from the full engine rated thrust
What could happen if you advance the thrust levers further then TO1 or TO2 fixed derate following and engine failure?
Loss of direction control
When does the CDU message INSUFFICIENT FUEL display?
Fuel at destination is less than FMC RSV (entered on the PERF INIT page)
Can ATC monitor airplane position on the ground when the transponder is in STBY?
No
Are LNAV and VNAV available in alternation navigation?
No
What happens when an active database expires in flight?
Expired database is used until the active date is changed on the ground
How is the reference thrust changed from TO (D-TO, TO1 or TO2) to CON on upper EICAS following an engine failure? (3)
- 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
What databases are contained in the FMC? (4)
- Aero Engine
- Navigation
- Operational Program Configuration
- MAGVAR Tables
When will the FMC fail to sequence the active waypoint?
More than 21nm from the active route AND not on an offset route
On the 747-8, what modes of operation are available for the MultiScan weather radar? (2)
- Manual
- Automatic
On the 747-8, does the MultiScan weather radar provide turbulence detection capability?
Yes, displays magenta for mod-sev turbulence when there is sufficient precipitation (CAT cannot be sensed by the radar)
When armed for T/O, when does VNAV activate?
400’
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?
VNAV ALT
What VNAV FMA would display on the PFD during departure waypoint altitude constraints?
VNAV PTH
What’s is the difference between RNP and ACTUAL? Where is it displayed?
- RNP is required navigation performance
- ACTUAL is the Actual Navigation Performance
- Displayed on the FMC POS REF page)
What is a conditional waypoint?
Waypoint based on a time or altitude requirement, and not based on a land reference.
