ATPL Aero & Systems study plan

Draw from memory a wing and fuselage load path showing how bending, shear, torsion and pressurisation loads are carried, and label the structural members involved.

Distinguish limit load, ultimate load and proof load, and state the factors and safety margins that separate them.

Explain the purpose and operating principle of a hydraulic pump, accumulator, reservoir and pressure relief valve in a typical transport aircraft circuit.

Compare open-centre, closed-centre and power-pack hydraulic architectures and state one operational consequence of each for system redundancy.

Trace the flow of bleed air from engine or APU through precooling, air-conditioning packs and cabin distribution, naming each component and its function.

Explain how cabin differential pressure, outflow valve position and cabin altitude controller interact to hold a selected cabin altitude during climb and cruise.

Describe the operation of a pressurisation controller in automatic and manual modes and state the protective functions that prevent overpressure and negative differential.

Compare AC and DC generation on a transport aircraft, including constant-speed drive or integrated drive generator principles, busbar distribution and parallel operation.

Explain how essential and emergency buses are powered after loss of main generators, naming the sources used.

Explain the function of ailerons, elevators, rudder, spoilers and flaps in terms of the axis and phase of flight each controls.

Describe how fly-by-wire replaces mechanical linkage, including sensor inputs, flight control computers, actuator commands and reversion modes.

Explain the purpose of autopilot servo or actuator engagement, autopilot disconnect logic and the conditions that cause automatic disengagement.

Calculate simple hydraulic actuator force and speed relationships from piston area and flow rate, and explain how a servo valve meters flow.

Identify the failure modes of a hydraulic actuator and the protections used against runaway, jam and loss of pressure.

Describe the sequence of events in landing gear extension and retraction, naming the actuation, locking, warning and indication elements.

Explain antiskid and auto-brake operation, including how wheel speed signals and brake pressure modulation prevent skidding.

Compare tyre construction, inflation pressure effects and the causes of tyre damage such as under-inflation, overheating and hydroplaning.

Describe a typical fuel system layout including tanks, boost pumps, crossfeed, refuelling and venting, and explain how fuel is sequenced and balanced in flight.

Explain the purpose of fuel quantity indication, low-pressure warnings and jettison where fitted, and identify the consequences of fuel imbalance.

Compare the methods used for airframe and engine anti-ice and de-ice, including thermal bleed air, electrical heating and fluid systems, and state where each is applied.

Explain how ice detection and warning systems work and describe the aerodynamic and performance penalties of airframe icing.

Describe fire and smoke detection principles including detector types, warning logic and the actions a crew takes after a fire warning.

Explain fire extinguishing agents and the operation of engine and cargo compartment suppression systems.

Summarise the protections against rain and hail ingress, including windshield heating and rain removal, and relate them to the ice protection system.

Describe the four-stroke cycle of a piston engine and explain how mixture, ignition timing and manifold pressure affect power output.

Explain the operation of a constant-speed propeller and how the governor changes blade angle to hold selected RPM.

Describe the main sections and airflow path of a gas turbine engine and explain how each stage contributes to thrust.

Explain how thrust varies with altitude, temperature and Mach number, and distinguish gross, net and rated thrust.

Interpret engine monitoring parameters such as EGT, N1, N2, fuel flow and oil pressure, and state what an abnormal trend indicates.

Re-derive the structural limitation terms including manoeuvring speed, design dive speed and gust load, and explain how each constrains operation.

Explain how flight control laws and protections in a fly-by-wire aircraft limit pitch, bank and angle of attack, and relate these limits to structural load protection.

Describe the structural and operational limits that apply to landing gear, including speed limits, tyre limit loads and brake energy limits.

Solve mixed numerical problems on load factor, hydraulic pressure and brake energy to check retention from earlier weeks.

Consolidate the system domains by producing a one-page summary of each of hydraulics, pneumatics and pressurisation, electrical and fuel, and ice and fire protection.

Compare the redundancy philosophy across hydraulic, electrical and fuel systems and state the common design principles behind them.

Complete a timed mixed mock of at least 40 questions across all ten domains and record the score by domain.

Identify the three weakest domains from the mock and write a targeted revision action for each.