Protections and Stabilities 1

Question 1

What are the indications that alpha lock is triggered?

Answer 1

A-LOCK pulses on EWD (just above the slats on the slat/flap position indicator)

Question 2

What are the characteristics of abnormal attitude law?

Answer 2

Operates like normal law with no stabilities, and auto pitch trim is also lost

Question 3

What does low speed stability do in alternate law? Can this be overridden?

Answer 3

Introduces a progressive nose down input, which can be overridden by pilot input

Question 4

In mechanical backup, what can be used to control the aircraft?

Answer 4

THS, rudder and differential thrust

Question 5

What does high speed stability do in alternate law? Can this be overridden?

Answer 5

Introduces a nose up demand when above VMO/MMO which can be overridden by pilot input

Question 6

When do you get an overspeed warning?

Answer 6

VMO +4
MMO +0.006

Question 7

At what point does AP disconnect in slow speed?

Answer 7

Valpha prot + 1 degree

Question 8

At what angle of bank does the AP disconnect?

Answer 8

45 degrees

Question 9

When is abnormal attitude law triggered?

Answer 9

When normal law envelope is exceeded by external forces (eg wake turbulence encounter)

Question 10

What happens once recovered from abnormal attitude law?

Answer 10

Auto pitch trim is regained, and aircraft will be in alternate law for the remainder of the flight. The aircraft lands in alternate law

Question 11

With sustained sidestick input, what will speed decay until?

Answer 11

ValphaMax

Question 12

At what angle of bank do the FDs disappear?

Answer 12

45 degrees

Question 13

When does AP disconnect in overspeed?

Answer 13

VMO +15
MMO +0.04

Question 14

What is the purpose of abnormal attitude law?

Answer 14

Prevents normal law from impeding recovery

Question 15

With A/THR engaged, what lowest speed will you decrease towards?

Answer 15

VLS +/-2kt

Question 16

When does the aircraft revert to direct law?

Answer 16

When in alternate law, gear down, AP off for landing

Question 17

What is the high AoA protection bank angle limit?

Answer 17

45 degrees

Question 18

What triggers alpha lock?

Answer 18

Activated by SFCCs when flap lever moved from position 1 to 0 and either:
Alpha above 8.5 degrees or
Speed below 148kts

Question 19

How can you identify that you are in mechanical backup?

Answer 19

MAN PITCH TRIM ONLY in red on PFD

Question 20

What is VLS?

Answer 20

Lowest selectable speed

Question 21

What is VMO/MMO?

Answer 21

350kt/M0.82

Question 22

Below alpha prot, what does sidestick command?

Answer 22

Alpha, instead of load factor

Question 23

Do we keep protections and stabilities in direct law?

Answer 23

No, but overspeed and stall warnings still remain available

Question 24

How can you tell you are in direct law?

Answer 24

USE MAN PITCH TRIM in amber on the PFD

Question 25

Will AP disconnect in alternate law for high speed or bank?

Answer 25

Yes for both. Speed if above VMO/MMO, bank if above 45 degrees

Question 26

What are the main protections in normal law?

Answer 26

Load factor Pitch attitude Bank angle High speed High AoA

Question 27

What are the load factor limitations in normal law?

Answer 27

Clean -1g to +2.5g Configured 0g to +2g

Question 28

What does the low speed regime in normal law provide?

Answer 28

Low energy aural alert "SPEED" Alpha floor protection Neither of these are flight control protections

Question 29

What replaces the low speed alpha indications?

Answer 29

VSW

Question 30

What is the maximum bank angle for auto pitch trim and bank hold?

Answer 30

33 degrees