Auto Flight

Question 1

On the FMA, what is the difference between Speed and Thrust modes on the Auto Thrust column?

Answer 1

Speed mode: pitch mode controls the vertical rate, speed is constant. an example would be when speed mode is used on finals with flight directors off.

Thrust mode: pitch adjusts and thrust follows. We adjust the pitch to get a target speed. Example: Expedite descent, climb and descent modes

Question 2

Give 4 examples of when the auto thrust is in Speed mode.

Answer 2

V/S or FPA, G/S, ALT

Question 3

When do the auto thrust arm?

Answer 3

When the thrust levers are set to the take off setting

Question 4

After take off, the engines are in the armed mode when in TOGA or Flex, when does the auto thrust activate?

Answer 4

Setting the levers to the Climb detent

Question 5

The auto thrust will remain engaged between which detents?

Answer 5

Two engines: Between Climb and Idle detents

SEO: Between MCT and Idle detents

Question 6

What happens when the thrust lever on a 2 engine operating, are moved further than the climb detent or SEO, further than the MCT detent?

Answer 6

The auto thrust will revert to armed mode and more thrust is added

Question 7

How can the auto thrust be permanently disconnected?

Answer 7

Press the instinctive disconnect pb more than 15 secs