The FMS (25-05-18)

Question 1

What does the FMS typically consist of?

Answer 1

FMC

Autopilot/flight director system (AFDS)

Auto throttle (A/T)

2 intertial reference systems (IRS)

Question 2

How often must the navigation database in the FMS be updated?

Answer 2

Every 28 days

(AIRAC cycle)

Question 3

Can a pilot change the data in the performance or navigation database in the FMS?

Answer 3

No the are READ ONLY to the pilot(s)

Question 4

What kind of data is stored in the performance database in the FMS?

Answer 4

TO data

climb data

cruise data

descend data

holding data

go around data

abnormal flight conditions data (OEI)

Question 5

What kind of data is stored in the navigation database in the FMS?

Answer 5

Nav facilities

waypoints

airports & runways

terminal procedures

approach and go around procedures

routes

comapny routes

DOES NOT CONTAIN TERRAIN/OBSTACLE DATA

Question 6

How is the data in the navigation database in the FMS kept up to date?

Answer 6

By the operations department

Question 7

What does a cost index of zero mean?

Answer 7

the plane is flown at maximum range thus minimum trip fuel

Question 8

How does a Honeywell system FMS work?

Answer 8

It uses a blending of actual and predicted wind

actual wind is for course corrections in the present time

predicted wind is for downroute calculations

Question 9

What is a Kalyan filter?

Answer 9

an algorithm used for filtering incomplete and noisy measurements of dynamical processes to minimise errors.

combines info from various sensors and beacons to get position

if inputs are lost the system will go into DR mode.