B767 Flight Controls Exam 2025
Which hydraulic systems control horizontal stabilizer trim? - Correct Answer-Left and
Center
What are the 3 ways to move the Horizontal Stab Trim? - Correct Answer-1. Electric
Trim - control wheel switches
2. Alternate Trim - switches to the left of the thrust levers
3. Automatic Trim - the autopilot
Which method of Horizontal Stab Trim uses only 1 motor/half rate of trim? - Correct
Answer-Automatic Trim
Which method of trim disengages a single autopilot if actuated? - Correct Answer-
Electric Trim
Which Horizontal Stab Trim mechanisms use 2 motors/full rate to trim? - Correct
Answer-Electric and Alternate Trim
Is Electric Trim enabled with multiple autopilots engaged? - Correct Answer-No
Does the Alternate Trim disengage the autopilot if used during autopilot operations? -
Correct Answer-No, the autopilot will retrim after the Alternate Trim Switches are
released
Which Trim source cancels conflicting trim commands? - Correct Answer-Alternate Trim
Which hydraulic system actuates the Left Autopilot? - Correct Answer-Left Hydraulic
System
Which hydraulic system actuates the Center Autopilot? - Correct Answer-Left OR
Center Hydraulic System
Which hydraulic system actuates the Right Autopilot? - Correct Answer-Center
Hydraulic System
What does the UNSCHED STAB TRIM Discrete Light mean if illuminated? - Correct
Answer-trim is moving when not commanded
What does PES stand for? - Correct Answer-Pitch Enhancement System
B767