Part-66 Module 1 study guide
Part-66 Module 1 · Work through your exam, one topic at a time.
Part-66 Module 1 (Mathematics) is one of the basic knowledge modules that make up the aircraft maintenance licence knowledge requirement under the European aviation maintenance licensing framework. It is aimed at candidates working toward, or maintaining, a Part-66 aircraft maintenance licence, and at training organisations building Part-147 basic courses around the module syllabus. The Part-66 Module 1 study guide has 12 sections and about 3,514 words.
01Mathematics
Module 1 mathematics for aircraft maintenance is arithmetic and applied algebra, not pure theory. Expect: fractions and decimals, percentages, ratio and proportion, powers and roots, simple and compound interest, averages, and mensuration (areas and volumes of rectangles, triangles, circles, cylinders, spheres, cones).
261 words, about 1 min02Physics
Physics underpins every system you will maintain. You need: matter (states, density, specific gravity), mechanics (mass vs weight, force, moments, centre of gravity, stress and strain, levers), motion (velocity, acceleration, Newton's laws), energy (kinetic, potential, work, power), heat (temperature scales, expansion, heat transfer by conduction, convection and radiation), pressure (Pascal's law, hydrostatic pressure, gauge vs absolute), sound, and basic light behaviour.
288 words, about 1 min03Electrical Fundamentals
You must understand electron flow versus conventional current, voltage, current and resistance, and apply Ohm's law (V = IR) and power relationships (P = VI = I²R = V²/R). Cover series and parallel circuits, Kirchhoff's laws, resistors, capacitors (charge Q = CV, energy ½CV²), inductors, magnetism and electromagnetism, AC theory (frequency, period, peak, RMS, average values, phase), transformers, and the basics of DC machines and generators.
318 words, about 2 min04Electronic Fundamentals
This domain covers semiconductor devices and their aircraft applications. Know diodes (forward and reverse bias, rectification, zener regulation), bipolar transistors as switches and amplifiers (base, collector, emitter; NPN and PNP), field-effect transistors, thyristors, and integrated circuits.
294 words, about 1 min05Digital Techniques / Electronic Instrument Systems
You need number systems (binary, octal, hexadecimal and conversions), logic gates and truth tables, combinational and sequential logic (flip-flops, counters, registers), buses and data transmission (serial versus parallel, ARINC 429, ARINC 629, MIL-STD-1553, Ethernet), analogue-to-digital and digital-to-analogue conversion, displays (CRT, LCD, LED), and electronic instrument systems including EFIS, EICAS/ECAM, FMS, and glass cockpit architecture with redundancy and reversionary modes. Bit significance : most significant bit is the leftmost in written binary; get the place values right (1, 2, 4, 8, 16...).
285 words, about 1 min06Materials and Hardware
Know aircraft ferrous and non-ferrous materials: aluminium alloys (2024, 7075), titanium, magnesium, steels, and composites (fibre types, lay-up, honeycomb). Understand heat treatment, corrosion types (galvanic, stress, exfoliation, fretting) and prevention.
299 words, about 1 min07Maintenance Practices
This is the largest practical domain. Cover safety practices (COSHH-type hazards, fire, working at height), workshop practice and tools, engineering drawings and diagrams, fits and clearances, maintenance planning and documentation, defect reporting, inspection and testing, and the rules governing maintenance release.
308 words, about 2 min08Basic Aerodynamics
Understand the atmosphere (ISA, pressure, density, temperature lapse), airflow and Bernoulli's theorem, the generation of lift and drag, boundary layers (laminar and turbulent), and the four forces in equilibrium. Know aerofoil terminology: chord, camber, angle of attack, stagnation point, centre of pressure.
298 words, about 1 min09Human Factors
Human factors is about performance and limitation. Know the SHELL model and the dirty dozen; the senses (vision, hearing, proprioception) and their limitations; memory (short and long term) and attention; information processing and decision making; stress, fatigue, circadian rhythm and sleep; motivation and peer pressure; teamwork, leadership and communication; and error models (slips, lapses, mistakes, violations).
293 words, about 1 min10Aviation Legislation
Know the structure of ICAO (Convention on International Civil Aviation, Annexes, especially Annex 1 personnel licensing and Annex 8 airworthiness), the role of the national authority (EASA in Europe, FAA in the US), and the Part-66 licensing system: categories (A, B1, B2, B3, C), subcategories, basic knowledge requirements, experience requirements and the route to certification. Understand Part-145 maintenance organisations, Part-M/Part-CAMO continuing airworthiness, airworthiness directives, service bulletins, and the technical log.
294 words, about 1 min11Aeroplane Aerodynamics, Structures and Systems
Combine aerodynamics with aircraft hardware. Cover high-lift devices (flaps, slats, spoilers), flight controls (ailerons, elevators, rudder, trim, fly-by-wire), hydraulic and pneumatic power, air conditioning and pressurisation, fuel, ice and rain protection, landing gear, and the electrical and avionics architecture.
274 words, about 1 min12Helicopter Aerodynamics, Structures and Systems
Helicopter aerodynamics differs fundamentally from fixed wing. Cover rotor systems (fully articulated, semi-rigid, rigid), the controls (collective, cyclic, pedals), and the aerodynamic phenomena unique to rotors: dissymmetry of lift, blade flapping, lead-lag, retreating blade stall, translational lift, autorotation, ground effect, vortex ring state, and tail rotor drift and roll.
302 words, about 2 min