Protections

Question 1

Load Factor protection values?

Answer 1

+2.5G to -1G CLEAN

+2G to 0G CONFIGURED

Question 2

Pitch Attitude protections?

Answer 2

Config 0-3…… +30 to -15

Config full…….+25 to -15

Question 3

In pitch when do FD bars disappear/reappear?

Answer 3

Disappear +25 or -13

Reappear +22 or -10

Question 4

Describe AoA protection

Answer 4

Once speed reduces into Amber barber pole it goes beyond A PROT which changes flight control law to direct. Beyond this at some point A FLOOR activates which gives full power from engines. The pitch will not go beyond A MAX therefore providing max climb angle

Question 5

If side stick released at A MAX what will happen to pitch?

Answer 5

Attitude returns to A PROT

Question 6

When does AP disconnect in AoA protection?

Answer 6

A PROT + 1*

Question 7

What does AoA give protection against?

Answer 7

Windshear and stalling

Question 8

What is alpha floor and when does it activate?

Answer 8

Athr function that activates at certain point below alpha prot
It commands TOGA
Available from lift off to 100ft above landing

Question 9

How do you recover from Alpha Floor?

Answer 9

Clicking the instinctive PBs on the thrust levers. Put the thrust levers in the climb gate and re-engage A/THR on the FCU

Question 10

If you hold the instinctive PBs on the thrust levers for 15s what happens?

Answer 10

Disengage ATHR until the end of the flight. A FLOOR not available

Question 11

Is alpha floor available in alternate law?

Answer 11

No

Question 12

How does high speed protection work?

Answer 12

If full forward side stick is applied, the a/c will exceed Vmo/Mmo.
The a/c will neutralise the side stick and then command a nose up pitch until the speed reduces to normal

Question 13

What happens to bank when high speed protection is active?

Answer 13

Max bank angle 40*

Bank returns to 0 if side-stick released

Question 14

What is load alleviation function?

Answer 14

Automatic function when clean. Wing loads are unloaded by inverting the ailerons and deploying spoilers

Question 15

Centring Beta target in SE conditions provides what?

Answer 15

Minimum drag and best climb performance

Question 16

How does bank angle protection work?

Answer 16

Bank angle limited to 67, when above 33 and side stick released, bank returns to 33*

Question 17

How is level flight maintained in bank up to max bank angle?

Answer 17

Up to 33* auto trim will maintain level flight. Above 33* back pressure on sidestick is required to maintain level flight

Question 18

Is there any relationship between BA protection and the others?

Answer 18

If AoA protection active, max BA will not exceed 45*

If high speed protection active, will not exceed 40* and will return to 0 when sidestick released

Question 19

What is the low energy warning?

Answer 19

Low energy warning below 2000ft in flaps 2, 3 or Full so pilot can take appropriate action before A FLOOR

Question 20

When is low energy inhibited?

Answer 20

• below 100ft RA
• when TOGA is set
• during EGPWS
• Dual Rad Alt Fail

Question 21

What is Alpha Lock?

Answer 21

Prevents slat retraction at high attitudes and low speeds.

Active below 148kts and AoA>8.5*