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)