31 Indicating/recording Systems

Question 1

What is TO inhibit?
When is it active?

Answer 1

TO inhibit prevents failures (not affecting safety of the flight) to appear during take off

Starts when TO thrust selected until 1500ft

From 80kts, only essential warnings are not inhibited.

Question 2

When is landing inhibit active

Answer 2

From 800ft until 80kts on runway

Question 3

When does TO memo appear and disappear?

Answer 3

2 mins after 2nd engine start until TO power set

Question 4

When does landing memo appear?

Answer 4

Below 2000ft RA until 80kts

Question 5

When does BUSS appear?

Answer 5

Failure of all 3 ADRs
Based on AoA

Question 6

If DU has ‘Invalid data’ on screen, what should you do?

Answer 6

Could indicate failure of DMC. Use ECAM switching to change to standby DMC

Question 7

What/how many FWC are there?

Answer 7

2 Flight Warning Computers

Generate all aural synthetic voice warnings as well as rad alt and DH callouts. Divides its functions into flight phases

Question 8

What/how many DMCs are there?

Answer 8

3 DMCs

They power the DUs and take info from many sources and communicate it to the DUs

Question 9

All speeds are updated constantly based on a/c weight…how?

Answer 9

In flight, FACs calculate weight of the a/c by comparing aerodynamic and a/c parameters. It calculates VS1g and uses this to work out entire flight envelope and operating speeds.

It does this up to 14500ft and then uses GW less fuel burn