Navigation Flashcards
What Mode do the Automatic Dependent Surveillance broadcast (ADS-B) operate
All Transponder modes except STBY
How many FMC’s are there
3
left
right
center
(one is selected as the master and another as a back up)
What do you do on the preflight if the IRS is on when you come to the aircraft
turn off for 30 sec and then on
we do a complete alignment every flight
When is the autotabbing feature available
only during FMC preflight, but on RTE page 1 PERF INIT, and TAKEOFF REF page 1 and only if they are selected by a LSK
What is the limitations for LNAV engagement
Armed
> 50 ft
2.5 nm from active route
How does the FMC calculate a turn in LNAV
Evaluates 5 min prior
uses bank angle limit (based on wt and alt)
(FMC tries to use a bank that will not effect ALT or A/S)
What does EICAS - LNAV BANK ANGLE LIM
mean
reduced bank angle limit has produced a overshoot of the turn
When making changes to your route what pages do you use
if it involves a using an airway name ie route you have to use the RTE page
If it does not involve an airway name use the LEGS page
How do you create an along track waypoint
25 nm before
25 nm after?
RZS/25 = 25 nm after RZS
RZS/-25 = nm before RZS
How do you build a WPT in the middle of no where
4 ways
place bearing/place bearing = RZS320/AVE195
place bearing/distance = ZONAL270/15
Lat/Long = N25W018 or N3538.8W12136.2 (for decimals)
PICK WPT on ND = moves a lat/long to the scratchpad
(dont forget to close out the route discontinuity)
How do you create an intercept course from a WPT
right 360 to intercept the 280 deg radial from ROBIE
360 SEL
LEGS Page
ROBIE280 to L1
(280) appears
INTC CRS FROM appears on 6R
EXEC
Arm LNAV
How do you create an intercept course TO a WPT
right DG 310 intercept the 090 radial TO BSR
310 SEL - MCP
LEGS page
ReEnter BSR to L1 (even if you are already going there)
INTC CRS TO appears on 6R
enter the track to the WPT not the radial
(090 radial to would be 270)
EXEC
Arm LNAV
Does LNAV use great circle courses or Direct to between WPTS
Great Circle
How do we do a Intercept Course TO
Select BSR as active WPT into L1
Select INTC CRS TO
new INBD CRS is created
EXEC
select LNAV
How can you create an offset?
RTE pg
Enter the direction of offset and distance
R75 - 6R
(up to 99 nm)
How can you remove an offset
RTE page
enter a 0 for an offset - 6R
(aircraft turns to a 30 deg intercept)
option b
delete the offset on the RTE page
What is the FIX page for
DME Arc
Bearing intercepts
Abeam WPT
move to scratch pad then place on LEGS page
how do you do an abeam
FIX
ROBIE in 1L
Abeam L5
L5 again puts it in scratch pad
LEGS page
put scratch pad in L1
put next WPT back in L2
EXEC
Delete FIX info (New WPT remains)
PROG page has a Free Play line what is it
PROG pg 1 - DEST
Enter any point you like and if its in the nav database it will give you enroute info like dist, time, fuel etc
What is PROG pg 2
Detailed information on environment and fuel
How does the fuel get calculated?
2
Calcaulated - based on fuel burn
- used by FMC
Totalizer - sensed based on fuel level sensors
(PROG pg 2 L6/R6)
(only time FMC looks at Totalizer is before eng start)
How do you get RTA (required time of arrival)
PROG pg 3
only works in Cruise
What does PROG pg 4 tell you
RNP parameters
What is the ALTN Page
Alternates for diversion
pg 1 list 4 closets airports/ time/fuel
(A - next to the Airport signifies that this is the FMC default)
if you want to block out airports from being alternates how do you do it an how many can you do
ALTN pg
5R - ALTN INHIBIT
2 airports
What do you have to remember about the DIVERT NOW promot
it dosent divert you anywhere unless you select EXEC first
Where can you find a drift down profile
ALTN pg 1
ENG OUT
How do you leave a hold
Direct to fix
or
select EXIT HOLD
What provides navigation
ADRS - Air Data Reference system
IRS
GPS
What makes up the ADRS
6 air data modules 6 static ports 3 pitot ports 3 pitot probes 2 AOA sensors TAT probe 2 eng TAT probes
How does 787 determine its position
IRU + GPS + AHRU = Stable Hybrid Position
What makes up the IRS
Right and Left
IRU + AHRU
What does the ON BAT between the IRS switches mean
Hot battery bus is powering the IRS
What will make a ILS tune automatically
Approach in the active route
and
<50 nm from T/D
or
150 nm from landing runway
or
FMC in descent mode
How many transponders
2
Where can we find ANP/RNP
on PROG pg 2
L5 RNP/ACTUAL
What is ANP
Actual navigation performance
0.06 = 0.06 nm radius of a circle that the aircraft is in 95 % of the time
What is RNP
required navigation performance
depends on phase of flight Oceanic En-Route Terminal Approach
How do we deal with the requirement for True north in the FMC Polar Region
We dont, all done automatically
If Heading Ref is NORM
What is used for ATC DATALINK
CPDLC - Controller to Pilot DataLink comunications
What are the 3 VNAV Modes
VNAV SPD -commanding pitch to maintain airspeed
pink bug and pink speed at top of tape
VNAV PTH - commanding pitch to maintain vertical path
VNAV ALT - Temparary ALT hold Mode - Due to MCP alt it holds until it can climb to the planned VNAV PTH
Just after rotation what speed is targeted by the the FMC
V2 + 15 kts
or
Air Speed at rotation + 15 kts whichever is greater
When does LNAV and VNAV engage during T/O
LNAV - 50 ft
VNAV - 400 ft
Where does the VNAV profile created
in the VNAV pages on the CDU
THR REDUCTION - 1,000 ft
ACCEL HT - 3,000 FT
When does the VNAV climb Phase start
after T/O when the FMC commands climb thrust - THR REDUCTION
What are the VNAV Altitudes used for thrust management based on
AGL
What is the VNAV limit to airspeed with respect to flaps
max of 5 kts below red line flap placard speed
Where does the ECON SPD come from
COST INDEX
entered at the preflight
When does FMC switch to Cruise phase
T/C
top of climb
What is step size
point when wt is reduced and a higher alt is safe to save fuel.
2,000 ft
ICAO 4,000
How do you create a step climb for VNAV
LEGS page
Enter alt with and s as a waypt
/FL260S
How do you enter a specific speed at a Waypoint
LEGS page
Enter speed in Mach
.820/FL260
How can you set up an early descent
> 50 nm
Set MCP Altitude
VNAV descent page (pg 3)
DES NOW
(1250 fpm and used Cruise page parameters)
How can you set up an early descent
< 50 nm
Set MCP Altitude
1250 fpm and DESC page perameters
What is TAI/ON ALT
Thermal Anti-ice ON Altitude
Engine anti ice during descent
Calculates higher RPM to maintain Eng anti ice
What is OFFPATH DES
descending when not on LNAV
VNAV DESC page
creates a circle to the WYPT to see if you can make it in time
Clean and DRAG (speed brks) circle
(can be modified on the DESC page
When does VNAV Descent change to VNAV Approach
Flap moved out of UP
or
First waypt on the active approach
If descending below the approach path how does the VNAV transition
When flaps 1 are selected the Aircraft levels off until it intercepts the path
For IAN approaches what are the indications
G/P = G/S FAC = LOC
How can you get speed/flap guidance on app
make sure MCP speed window is blank
Where can you get nav information if you had a loss of all three FMC’s or loss of all displays
Alternate Navigation on TCP
press NAV button on TCP
ALT NAV pg 1
ALT NAV RADIO pg 2 (turn control on 1R)
(CAPT TCP works on STBY pwr)
(uses left INR)
(ILS displays on the ISFD and capt PFD)
