TRIMMABLE HORIZONTAL STABILIZER

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 at least one of 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

What happens to the THS after landing?

Answer 4

The trim automatically resets to zero if pitch attitude is < 2.5° in < 5 seconds