Chapter 6.40 - Autoflight

Question 1

What causes a steady red A/P disengage light?

Answer 1

• Stabilizer out of trim below 800 feet RA on dual channel approach
• ALT ACQ mode inhibited during autopilot go-around if stabilizer not trimmed for single autopilot operation
• Disengage TEST switch held in position 2
• Automatic ground system tests fail

Question 2

What causes an amber STAB OUT OF TRIM light to illuminate?

Answer 2

Autopilot is not trimming stabilizer properly