Airframe, Systems and Powerplant
The full EASA ATPL(A) Aircraft General Knowledge syllabus for airframe, systems and powerplant, taught properly: structures, hydraulics, landing gear and brakes, flight controls, pressurisation, ice protection, fuel, electrics, piston and turbine engines, and the protection and oxygen systems — every learning objective explained down to the component.
How an aircraft is designed to carry its loads and survive its own failures: stress and strain, the design philosophies and certification specifications, fatigue and corrosion, maintenance methods, and the materials, wings and fuselages they all shape.
The machine under the pilot: this opening module lays the structural foundations for the whole subject. It explains how designers think about loads and failure, what certification demands, how fatigue and corrosion age an airframe and how maintenance answers them, and then walks the airframe itself: materials and attachment methods, wings and tail surfaces, and the fuselage with its doors, windows and structural limits.
The muscle of a large aeroplane: Pascal's law and the multiplication of force, the fluids that carry the power and the rules for handling them, high- and low-pressure system types, and the pumps, valves, actuators and warnings that turn fluid pressure into moving surfaces and extended landing gear.
Almost everything heavy that moves on a transport aeroplane moves hydraulically: flight controls, landing gear, brakes, steering. This module explains why fluid under pressure earned that job, starting from a law of physics small enough to fit in a hand pump, and ending at the components, redundancy and cockpit indications of the systems the next modules will keep meeting.
The undercarriage from strut to runway: gear architecture and its retraction, protections and emergency extension, nose-wheel steering and shimmy, the brakes with their anti-skid and autobrake intelligence, and the wheels and tyres that carry everything the structure module computed.
Every flight borrows the landing gear twice, and between those loans the gear must fold itself into the airframe, lock in both directions, steer the aircraft at walking pace and at speed, and absorb more kinetic energy in a rejected take-off than almost any other component absorbs in its life. This module works through that machinery: the gear itself, the steering, the brakes, and the tyres where all of it meets the ground.
The machinery between the pilot's hands and the air: primary controls from cables to irreversible powered units with artificial feel, the secondary surfaces with their locks and asymmetry protections, and the fly-by-wire architectures that turned control runs into computed signals.
The Principles of Flight course taught what control surfaces do to the air; this module is about how they are made to move. It runs from the rod-and-cable simplicity of a light aircraft, through the powered, artificially felt controls of the classic transport, to fly-by-wire, where the connection from hand to surface is a computed signal with opinions of its own.
The aircraft's air systems: where pneumatic power comes from on pistons and turbines, the bleed-air plumbing with its valves, pre-coolers and leak detection, and the pressurisation and air-conditioning machinery that turns hot compressor air into a breathable cabin at altitude.
Compressed air is the third power system of the aircraft, after hydraulics and electrics, and its biggest customer is the cabin itself. This module follows the air from the compressor that squeezed it, through the ducts, valves and coolers that tame it, into the packs and pressure controllers that make seven miles of altitude survivable in shirtsleeves.
Keeping the aircraft's shape in icing air: the anti-icing and de-icing concepts, the hot-air, electrical and fluid systems that implement them, the inflatable boots of the propeller fleet, and the detectors that notice ice before the crew does.
Ice changes the aircraft: it re-shapes aerofoils, blocks probes, unbalances propellers and feeds engines things they should not eat. This short module covers the systems that prevent or remove it, and the detectors that stand watch, because the most dangerous property of airframe ice is how quietly it arrives.
Getting the fuel to the engines and knowing how much is left: the fuels themselves with their flash points, freezing points and densities, tanks from bladder to integral, gravity and pressure feed, boost pumps, crossfeed, venting, jettison, and the measurements the crew trusts.
Fuel is the heaviest single load most aircraft carry and the consumable the whole flight is planned around, and the fuel system's job description is short and absolute: deliver clean fuel at the right pressure to every engine, in every attitude, from the first litre to nearly the last. This module walks the piston aeroplane's version first, then the transport's, where the same jobs grow tanks, pumps and a jettison system.
The aircraft's electrical system from first principles to the flight deck: static electricity and bonding, DC and AC, switches and circuit protection, batteries and their hazards, generation and distribution, and the motors that turn electricity back into motion.
Electricity runs through every module before this one: the fuel system's boost pumps, the hydraulic system's electric pumps, the ice protection's heaters, the fly-by-wire computers. This module opens the box. It builds the vocabulary first (charge, current, voltage, resistance and power) then follows the energy from the battery and the generators through the distribution system to the consumers, and it treats the failures with the same care as the normal picture, because the electrical system is one of the few whose faults can smoke.
The engine that started aviation and still powers most of training: how the four-stroke cycle turns fuel into torque, the carburettors and injectors that feed it, the systems that cool, lubricate and ignite it, the propeller that converts its power into thrust, and the turbocharger and FADEC that modernise it.
Every professional pilot's first engine is almost certainly a piston engine, and the type rewards being understood from the metal up: when a student can picture what the crankshaft, valves and mixture are doing, the cockpit's levers and gauges stop being rituals and become controls. This module builds the engine from its vocabulary and moving parts to its fuels, support systems, propeller and the devices that let it keep its power at altitude.
The gas turbine from first principles to line operation: how continuous combustion makes thrust, the compressor with its stall and surge, the combustion chamber and turbine, the systems that fuel, lubricate, ignite and start it, reverse thrust, and the discipline of operating and monitoring it day to day.
The piston engine of the last module makes power in violent, separate events; the gas turbine makes it in one continuous, quiet process, and nearly everything that carries passengers for a living is built around it. This module works through the engine station by station, then through its supporting systems, and finally through how a crew runs and reads one in service.
The aircraft's guardians: the detectors that see smoke and feel fire, the bottles and logic that fight an engine or cargo blaze, the three ways of keeping a windshield readable in rain, and the oxygen systems that keep everyone conscious when the pressurised world of an earlier module fails.
Most systems in this course do their work every flight. Most of the ones in this final module hope never to work at all: detection and extinguishing for smoke and fire, protection for a rained-on windshield, and oxygen for the day the cabin's air lets go. They are judged not on service but on readiness.