Last Updated on 4 years by teboo
022 08 01 00 Trim systems
022 08 01 01 Design and operation
Syllabus reference BK Syllabus details and associated Learning Objectives
(01) Explain the purpose of the trim system and describe the layout with one trim system for each control axis, depending on the complexity of the aircraft.
(02) Give examples of trim indicators and their function, and explain the significance of a ‘green band/area’ for the pitch trim.
(03) Describe and explain an automatic pitch-trim system for a conventional aeroplane.
(04) Describe and explain an automatic pitch-trim system for an FBW aeroplane and that it is also operating during manual flight; however, during certain phases it may be automatically disabled to alter the handling characteristics of the aircraft.
(05) Describe the consequences of manual operation on the trim wheel when the automatic pitch-trim system is engaged.
(06) Describe and explain the engagement and disengagement conditions of the autopilot according to trim controls.
(07) Define ‘Mach trim’ and state that the Mach-trim system can be independent.
(08) Describe the implications for the pilot in the event of a runaway trim or significant out-of-trim state.
022 08 02 00 Yaw damper
022 08 02 01 Design and operation
(01) Explain the purpose of the yaw-damper system.
Syllabus reference BK Syllabus details and associated Learning Objectives
(02) Explain the purpose of the Dutch-roll filter (filtering of the yaw input signal).
(03) Explain the operation of a yaw-damper system and state the difference between a yaw-damper system and a 3-axis autopilot operation on the rudder channel.
022 08 03 00 Flight-envelope protection (FEP)
022 08 03 01 Purpose, input parameters, functions
(01) Explain the purpose of the FEP.
(02) “Explain typical input parameters to the FEP:
— AoA;
— aircraft configuration;
— airspeed information.”
(03) “Explain the following functions of the FEP:
— stall protection;
— overspeed protection.”
(04) Explain how the stall-protection function and the overspeed-protection function apply to both mechanical/conventional and FBW control systems, but other functions (e.g. pitch or bank limitation) can only apply to FBW control systems.