1.2 Syllabus Map & Knowledge Levels

Official Module 2 Structure (Appendix I)

EASA Part-66 Appendix I (as updated by (EU) 2023/989) organises Module 2 Physics into five numbered topic groups. Learn the map first so every later chapter has a home address in the legal syllabus—not just a chapter title in a study guide.

2.1 Matter

Matter covers the nature of the physical world at the scale needed for a technician: chemical elements, basic atomic structure (protons, neutrons, electrons), how atoms form molecules and chemical compounds, and the states of matter (solid, liquid, gas) including changes of state. You are not expected to be a chemist, but you must recognise that properties such as density, compressibility, and heat behaviour differ by state—and that aircraft systems deliberately exploit those differences (hydraulic fluid as nearly incompressible liquid, nitrogen as a gas in accumulators and tyres, solid structure carrying stress).

Typical exam angles: identifying states and state changes; linking atomic structure to the idea of mass and charge balance in simple terms; distinguishing elements, compounds, and mixtures at a conceptual level used later for materials and fluids.

2.2 Mechanics

Mechanics is the largest Module 2 block and the one most candidates under-estimate. Officially it splits into four interlocking streams:

If your study time is limited, allocate the largest share to 2.2. A large fraction of Module 2 multi-choice items live here because mechanics connects almost every maintenance task that involves force, motion, or fluid power.

2.3 Thermodynamics

Thermodynamics in Module 2 is applied heat physics, not university-level entropy proofs. Expect:

• Temperature scales and the meaning of absolute zero
• Heat versus temperature; heat capacity ideas at technician level
• Heat transfer modes: conduction, convection, radiation
• Expansion of solids, liquids, and gases with temperature
• Gas laws (Boyle, Charles/Gay-Lussac style relationships) and simple combinations
• Links to engine cycles, latent heat, and heat of combustion at the conceptual level used for powerplant awareness

The exam loves traps on temperature units. Charles’s-law style ratios need absolute temperature in kelvin. Leaving a value in °C is a classic way to produce a confident wrong answer.

2.4 Optics (Light)

Optics covers the nature of light, speed of light as a reference idea, reflection, refraction, simple lens behaviour, and fibre optics as used in modern aircraft data and inspection contexts. Depth is still basic-knowledge level: ray behaviour, refractive index ideas, and why fibre optics matter for high-bandwidth, EMI-resistant signal paths—not full optical design.

2.5 Wave Motion and Sound

Wave motion and sound close the syllabus: mechanical waves, interference and standing waves, speed of sound, intensity, pitch, quality/timbre concepts, and the Doppler effect. Aviation framing includes propeller and engine noise, structural vibration as wave behaviour, and inspection techniques that rely on understanding frequency and resonance (which also link back to kinetics).

Knowledge levels: 1 versus 2

Part-66 syllabus tables assign each topic a knowledge level. For Module 2 you must internalise what those numbers mean in exam behaviour:

• Level 1 — Familiarisation: know the names, basic facts, and simple descriptions. Recognise a correct statement; you are not expected to derive multi-step calculations or design-level reasoning.
• Level 2 — General application / understanding: know why something behaves as it does, apply simple formulae, and select the correct physical relationship in a short scenario. This is the level that produces calculation items and “which principle explains…” stems.

For Category B1 and B2 candidates, most Module 2 topics sit at level 2. That is why Module 2 feels “mathsy” compared with pure familiarisation modules: you are expected to rearrange v = u + at, F = ma, W = Fs, density relationships, and gas-law ratios—not only define the terms.

Category A and B3 depth differences

Category A (and the related lighter pathways such as aspects of B3 sitting patterns) does not carry the full Module 2 depth map that B1/B2 carry. In particular, optics (2.4) and wave motion and sound (2.5) are not required for Category A. Cat A still needs the physics that supports safe limited maintenance—matter, core mechanics, and thermodynamics ideas—but does not face the same light/wave syllabus load.

Category B1 / B2 / B2L candidates must prepare the full Module 2 Physics map at the knowledge levels published for their category. If you are dual-tracking (for example A now, B1 later), do not assume a Cat A pass “covers Physics forever” at B1 depth—confirm which credits and levels transfer for your NAA path, and fill optics/waves before a B1 Module 2 sitting if those topics were outside your earlier scope.

Why Module 2 underpins later modules

Think of Module 2 as the language layer for later AML modules:

• Module 6 (Materials and Hardware): stress, strain, elasticity, hardness-related behaviour, and temperature effects on materials all reuse statics and thermodynamics vocabulary.
• Module 7 (Maintenance Practices): torque, force multiplication, friction, safe jacking, fluid cleanliness and pressure, heat in processes, and vibration-related inspection practices rest on mechanics and heat.
• Module 8 (Basic Aerodynamics): streamline flow, Bernoulli relationships, pressure and density of air, and the idea of dynamic versus static pressure are fluid-dynamics cousins of Module 2.
• Powerplant modules: Otto/Diesel cycle awareness, heat of combustion, gas behaviour in cylinders and turbines, and energy conversion from chemical to mechanical work all start with Module 2 thermodynamics and dynamics.

Candidates who “scrape through” Module 2 by memorising isolated MCQ patterns often hit a wall when Module 8 or engines demand the same ideas in a new costume. Aim for transferable understanding, not only Module 2 option recognition.

Study strategy that scores on this paper

1. Build a one-page formula sheet early. Include at least: density ρ = m/V; F = ma; weight W = mg; work W = Fs; kinetic energy ½mv²; potential energy mgh; pressure p = F/A; Boyle p₁V₁ = p₂V₂; Charles V₁/T₁ = V₂/T₂ with T in kelvin; power as work/time. Rewrite it from memory daily until exam day.

2. SI unit discipline. Convert grams to kilograms, millimetres to metres, and bar/psi only when the stem forces a conversion you can justify. Most wrong numerical answers come from mixed units, not from “hard maths.”

3. Mass versus weight. Mass is kilograms (scalar quantity of matter). Weight is a force in newtons (mg). Stems that say “a 10 kg tool” are talking mass; free-fall force or load on a structure may need newtons. This single confusion sinks many Module 2 scores.

4. Kelvin for gas laws. Add 273 (or 273.15 when precision is stated) to convert °C to K before ratios. Never cancel Celsius values as if they were absolute.

5. Link every formula to a hangar picture. Bernoulli → pitot/venturi; moment → weight and balance; friction → brakes and fasteners; resonance → vibration damage; latent heat → phase change in systems that freeze or boil.

6. Practise timed sets at your category length. B1/B2: 52-style pace; A: 32-style pace. Use four-option practice banks to sharpen discrimination, then remember the real paper is three-option.

How this guide is organised against the map

Later chapters follow the official order as closely as practical:

1. Matter (atomic structure, compounds, states)
2. Statics (forces, CG, stress/strain, pressure/buoyancy)
3. Kinetics (linear and circular motion, vibration, machines)
4. Dynamics (Newton, energy, momentum, gyros, friction)
5. Fluid dynamics (density, viscosity, Bernoulli)
6. Thermodynamics (temperature, heat transfer, gas laws, cycles/latent heat)
7. Optics
8. Wave motion and sound

Use this section as a checklist when you revise: if you cannot explain each row of the 2.1–2.5 map in one or two sentences and solve a typical numerical for the level-2 topics, that row is still open risk on exam day.