*Flight Controls-Trimmable Horizontal Stabilizer

Question 1

How is 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 failure occurs can the THS be positioned?

Answer 3

Yes- mechanical trimming is possible by manually position 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).