Navigation

Question 1

When is IRS full alignment required?

Answer 1

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

Question 2

What CDU pages are available during alternate navigation?

Answer 2

-ALT NAV LEGS
-ALT NAV PROG
-ALT NAV RADIO

Question 3

What factor determines “Econ” speed?

Answer 3

Cost index

Question 4

If you are flying an approach with the FMC “on approach” logic, and aircraft rises more than 150ft above the path, the FMA pitch mode will change from VNAV PTH to what?

Answer 4

VNAV SPD

Question 5

On a 400 legacy FMC, when does approach phase of the FMS start? (“On approach logic”)

Answer 5

-When the initial fix of an approach sequences OR
-When the runway is the active waypoint and within 25nm

Question 6

NG “On approach logic” occurs under what conditions:

Answer 6

• Descent phase is active with flaps out of UP
• the airplane has sequenced the first waypoint (or FAXXX) of the active navigation database approach, or
• the airplane is less than 12 NM from the destination airport, on a direct-to or intercept course-to the active waypoint, and a manually entered end of descent altitude constraint is lower than the destination airport plus 500 feet, or
• the runway or missed approach point is the active waypoint and the airplane is within 25 NM of the runway

Question 7

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

Answer 7

Loss of directional control

Question 8

When does the FMC message “Insufficient Fuel” display?

Answer 8

-Estimated fuel at destination is less than the fuel reserve (FMC RSV) entered on the PERF INIT pg

Question 9

When will the FMC fail to sequence to the next waypoint?

Answer 9

-When more than 21nm from the active route and not on a route offset

Question 10

On the -8, what modes of operation are available for the multi scan weather radar?

Answer 10

-Manual Mode: operates like traditional radar
-Automatic Mode: merges into a total weather picture

Question 11

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

Answer 11

Yes: Magenta = MOD/SEV when there is sufficient precipitation

Question 12

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

Answer 12

400ft

Question 13

What is the difference between ANP and RNP and where are they displayed?

Answer 13

ANP: Actual Navigation Performance
RNP: Required Navigation Performance
Displayed: FMC POS REF pg