CPL Aircraft General Knowledge study materials
CPL Aircraft General Knowledge study resources

CPL Aircraft General Knowledge study plan

CPL Aircraft General Knowledge · Give each week a clear focus.

8 weeks · About 6 hours per week

Week 1

Aircraft general knowledge (airframe, systems and powerplants) & Airframe structures and flight controls

  • Map the airframe into its primary structural groups (fuselage, wing, empennage, landing gear) and label the load paths carried by each

  • Explain how semi-monocoque construction distributes stress between skin, stringers, frames and bulkheads, and why that matters for damage tolerance

  • Identify the three primary flight control axes and match each to its control surface, hinge line and actuation type

  • Sketch a labelled diagram of a typical wing spar, rib and skin attachment from memory and check it against your notes

Your checkpoint

A one-page hand-drawn airframe and flight-control schematic with every structural member and control surface named and correctly placed

Week 2

Aircraft general knowledge (airframe, systems and powerplants) & Airframe structures and flight controls

  • Distinguish primary, secondary and auxiliary flight controls and give one failure consequence for each

  • Describe the difference between cable-and-pulley, push-pull rod and fly-by-wire control runs, including the failure modes of each

  • Explain mass balance, flutter and aileron reversal and how aircraft designers prevent each

  • Summarise how high-lift devices (flaps, slats, spoilers) alter lift and drag through each phase of flight

Your checkpoint

A written comparison table of three control-actuation systems with at least two failure modes and one prevention measure per system

Week 3

Aircraft systems (electrical, hydraulic, pneumatic, fuel, ice and rain protection)

  • Trace the DC electrical system from battery and alternator/generator through bus bars, relays and circuit breakers to a named consumer

  • Explain the purpose and operation of a voltage regulator, overvoltage protection and the master switch

  • Describe how the hydraulic system generates, stores and distributes pressure, including accumulators, relief valves and selectors

  • Outline the pneumatic system: sources of bleed air, its uses and the pressure regulation and safety components involved

Your checkpoint

A labelled system diagram of the electrical and hydraulic circuits showing at least eight components and the function of each

Week 4

Aircraft systems (electrical, hydraulic, pneumatic, fuel, ice and rain protection) & Piston and turbine powerplants, propellers

  • Describe fuel system layout, tank types, venting, fuel selection and how water and contamination are managed

  • Explain the operation of carburettor icing protection and airframe ice and rain protection systems

  • Compare a horizontally opposed piston engine with a turbine engine on the basis of induction, compression, ignition and exhaust

  • Explain how a propeller converts engine power into thrust and define pitch, blade angle and constant-speed operation

Your checkpoint

A 400-word comparative write-up of piston versus turbine powerplant cycles, including one operational limitation of each

Week 5

Piston and turbine powerplants, propellers

  • Describe the four-stroke cycle and identify the function of each major piston engine component

  • Explain the ignition, lubrication and cooling systems of a piston engine and the consequence of each failing

  • Describe the turbine engine sections (intake, compressor, combustion, turbine, exhaust) and the gas flow through them

  • Explain propeller forces, feathering, and the effect of density altitude on propeller and engine performance

Your checkpoint

A labelled cutaway sketch of both a piston engine and a turbine engine with every section annotated and a short note on the function of each

Week 6

Instruments, warning systems and aircraft performance limitations

  • Explain the operating principle of the pitot-static instruments and the errors affecting each

  • Describe the gyroscopic instruments and their power sources, plus the failure indications when a source is lost

  • Identify the main engine and airframe warning systems and interpret a given set of warning indications

  • Explain how mass, balance and density altitude limit aircraft performance and calculate a simple take-off and landing performance figure from given data

Your checkpoint

A worked performance calculation (mass and balance plus take-off distance) with all assumptions and limiting values stated

Week 7

Aircraft general knowledge (airframe, systems and powerplants) & Aircraft systems (electrical, hydraulic, pneumatic, fuel, ice and rain protection) & Piston and turbine powerplants, propellers

  • Revisit the weakest two domains from earlier weeks and close every gap listed in your error log

  • Explain how airframe, system and powerplant knowledge combine in one normal flight profile from pre-start to shutdown

  • Describe the correct response to three specified system malfunctions using your own notes only

  • Answer 40 mixed practice questions and record the domain of every incorrect answer

Your checkpoint

An error log of at least 20 previously missed facts, each rewritten as a correct one-line statement and re-tested

Week 8

Aircraft general knowledge (airframe, systems and powerplants) & Airframe structures and flight controls & Aircraft systems (electrical, hydraulic, pneumatic, fuel, ice and rain protection) & Piston and turbine powerplants, propellers & Instruments, warning systems and aircraft performance limitations

  • Complete two full-length timed practice papers and record the score per domain

  • Rank your five domains by accuracy and revise the lowest-ranked one first

  • Recite the key limitations, speeds and system figures from memory without notes

  • Confirm every remaining uncertainty is resolved or flagged as needing review

Your checkpoint

A final scorecard showing per-domain accuracy on two timed papers, with a one-sentence revision action for any domain below 80 percent

Milestones

Week 2: Can draw and explain the airframe structure and all primary and secondary flight controls without notes

Week 4: Can trace the electrical and hydraulic circuits end to end and explain piston versus turbine operation in your own words

Week 6: Can explain every instrument's operating principle and complete a mass-and-balance and performance calculation unaided

Week 8: Score at least 80 percent on each of the five domains in two timed practice papers