Trimmable Horizontal Stabililzer

Question 1

How is the THS normally operated in flight?

Answer 1

The flight control computers control trim functions automatically

Question 2

If NO hydraulic power is available can the THS be positioned?

Answer 2

No - the THS requires hydraulic power from the Green or Yellow systems

Question 3

If a complete flight control computer failure occurs can the THS be positioned?

Answer 3

Yes, mechanical trimming is possible by manually positioning the Pitch Trim Wheel

Question 4

Can you move the PITCH trim wheel if all systems are working normally?

Answer 4

Manual inputs have priority over computer inputs. The autopilot will disconnect

Question 5

What happens to the THS when the aircraft enters into Ground Mode?

Answer 5

The trim automatically resets to zero (inside the green band)