Flight Management System

Question 1

How many GPS’s are on the aircraft?

Answer 1

2

Question 2

If one GPS fails, how would the pilot be alerted?

Answer 2

On master recall

Failure of a single GPS sensor causes the light to illuminate when either system annunciator panel is pushed.

Question 3

What is the priority order for FMC position updates?

Answer 3

• GPS

* two or more DME stations
• one VOR with a collocated DME
• one localizer and collocated DME
• one localizer.

Question 4

What will be lost following an IRS failure?

Answer 4

If alignment is lost in–flight, the navigation mode (including present position and ground speed outputs) is inoperative for the remainder of the flight. However, selecting ATT allows the attitude mode to be used to relevel the system and provide an attitude reference.

Question 5

What reversion is possible when an IRS has failed?

Answer 5

Transfer switch to both on left or both on right

Question 6

If conducting a quick turn, how is rapid alignment possible?

Answer 6

selecting ALIGN while the airplane is parked.

Question 7

If AC electrical power is lost to the IRS, how long does the right IRS continue to run on DC if no AC power is restored?

Answer 7

5 minuets

Question 8

If you were conducting a Walkaround Check and a horn sounds in the nose wheel well, what could this indicate?

Answer 8

IRS is on battery power.

Question 9

What are the % N1 reductions from full rate for TO-1 or TO-2?

Answer 9

10% and 20%

Question 10

What is the maximum % thrust reduction?

Answer 10

25%

Question 11

What are the advantages of reducing thrust with either the Fixed Derates or Assumed Temperature Method?

Answer 11

Reduced thrust takeoffs lower EGT and extend engine life. They are used whenever performance limits and noise abatement procedures permit.

Question 12

Is all data lost, when electrical power is interrupted in flight to the FMC?

Answer 12

If power is lost for more than ten seconds in flight:
• LNAV and VNAV disengage
• all entered data is retained by the FMC, and when power is restored the RTE LEGS page is displayed with the scratchpad message SELECT ACTIVE WPT/LEG.

Question 13

If there is an FMC failure in flight, will the autopilot disengage?

Answer 13

YES

Question 14

What reversion is possible for FMC failure?

Answer 14

In the downgrade mode:
• LNAV and Map are retained
• FMC Predictions are halted
• VNAV is disconnected
This is for dual failure