Study the EASA Part 66 license by linking every module to your target category's privileges. Map modules first, drill corrosion and task-classification scenarios, interleave legislation and human factors with technical content, and track readiness with a written rubric rather than a feeling of progress.
Map Modules to Your License Category Before You Study Anything
The basic examination is organized into modules, and your target category determines which technical modules matter and how content carries weight, so mapping comes first.
The basic examination is organized into modules spanning mathematics and physics through materials, maintenance practices, aerodynamics, human factors, and aviation legislation, plus category-specific technical modules. Before studying content, decide your target license category: B1 covers mechanical scopes such as structures, powerplant, and related electrical work, while B2 covers avionics scopes such as instruments, radio, and autopilot systems. Your category determines which technical modules you sit and how deeply, so mapping first prevents spending equal hours on content that carries different weight for your certificate.
Build the map on one page: list each module topic as a column and create three rows labeled core definitions, applied to mechanical tasks, and applied to avionics tasks. Fill each applied row with one concrete task, for example linking human factors to a shift-handover step, materials knowledge to a fastener selection, and legislation to a release signature. This forces you to study legislation and human factors as context for technical work rather than isolated trivia, which is how the modules actually interlock.
Aviation Legislation: Learn Rules as Decision Rights, Not Trivia
The legislation module rewards knowing which rule governs which decision: who may certify, what approvals organisations must hold, and how release to service is documented.
Study the license framework alongside the parts it connects to, such as approved maintenance organisations and continuing-airworthiness responsibilities, treating them as a system of decision rights rather than a list of definitions. For each named concept, including certifying staff privileges, organisation approvals, and release documentation, write one sentence answering: who may do this, and under what approval? When every rule can be restated as a permission boundary, recall becomes easier because each item has a job in the system.
Trace a complete chain once per week: a defect is found, a task is raised, work is performed, and a release document is signed. At each step, ask which actor holds which responsibility and which document proves it. Draw the chain faster each week; speed exposes the gaps. This exercise also builds the documentation vocabulary you need for maintenance-practice questions, so the two modules reinforce each other instead of competing for study time.
Human Factors: Treat Named Concepts as Diagnostic Labels
Human factors works as a diagnostic vocabulary: attach named error types and interface concepts to specific maintenance situations, with a control for each, instead of reading it as soft material.
Learn the named concepts precisely and keep them distinct: individual error categories, the well-known set of human-factor labels such as complacency, distraction, fatigue, and pressure, and interface models describing where people, machines, and procedures interact. Precision matters because a vague label explains nothing. Distraction applied at a specific task step points to a concrete control, such as a checklist interruption protocol, while a general complaint about human error points nowhere and cannot answer a scenario question.
Use short paper case descriptions: a step skipped during a night shift, a mismatched part fitted under schedule pressure. For each case, produce a two-line analysis naming the human-factor concepts present and the barrier that would have caught the failure. This trains the applied reading the module rewards and builds a habit of analysis that also serves safety-management content, without drifting into generic advice about working carefully.
Keep a small set of reference cases, one per concept, and rotate them into your technical module study: when you drill a brake change or an avionics unit swap, name which human-factor risks attach to which step.
- Match each human-factor label to one concrete maintenance situation you can describe in a sentence.
- For every label, name one control: checklist step, handover discipline, interruption protocol, or workload check.
- Distinguish individual error concepts from organisational factors; they call for different corrective actions.
Corrosion Identification Drives the Repair Decision
Corrosion questions hinge on identification: the corrosion type and the metals involved determine assessment and treatment, so classification always precedes any removal decision.
Scenario: during a structure inspection you find powdery white deposits and pitting around steel fasteners set in an aluminum skin panel. A plausible mistake is treating this as ordinary surface oxidation and polishing it away. The better decision is to recognize galvanic corrosion driven by the dissimilar-metal pair, then remove the corrosion using an approved mechanical method, assess remaining material against damage limits for that structure, and restore protective isolation such as sealant or a compatible primer before closing the joint.
The sequence matters because treatment follows identification: intergranular attack requires a different assessment than surface pitting, and simply removing deposits leaves the galvanic condition in place, so deterioration returns at the same joint. Distinguishing corrosion types by appearance, location, and the metals involved turns an open-ended inspection problem into a decision chain you can rehearse on paper. Rehearse with written cases and photographs of typical corrosion signatures, and practice writing the full chain: identify, assess, treat, protect, verify.
Electrical Fundamentals: Trace the Circuit Instead of Guessing the Fault
Electrical topics reward circuit tracing: given a symptom, derive the probable fault location from the circuit's logic rather than recalling component facts in isolation.
Practice reading schematic conventions: power sources, distribution buses, circuit protection, loads, and grounds. Then trace a described symptom through them. Worked example: a load is inoperative, circuit protection is intact, and power is confirmed present at the bus. Reasoning through the circuit path, the fault must lie between the protection device and the load, narrowing the possibilities to connectors, wiring, or the load itself. Deriving this narrowing on paper trains exactly the reasoning these questions ask for.
Keep the analogue and digital strands separate in your notes: series and parallel circuit analysis, Ohm's law and power calculations on one side; logic gates, binary representation, and basic digital conventions on the other. Mixing them produces careless errors, such as applying DC circuit reasoning to a logic-level problem. Once a week, rebuild both strands from a blank page and compare against your notes; whatever you omit is your revision list for the next cycle.
Documentation and Task Classification: B1 or B2 Privileges in Practice
Before any task, classify the system family and the task type; the license category and the approval framework determine who may perform and certify the work.
Scenario: an autopilot flight guidance computer reports a fault, the unit is replaced as a line-replaceable item, and a built-in test is run. A plausible mistake is assuming privileges by habit: I replace units, therefore I certify the task. The better decision is to classify first: which system family the item belongs to, what the task involves, and which category's privileges and applicable approvals cover performing and releasing that work. Classification is the skill; the physical task is only its output.
Build the reflex with a drill. List fifteen tasks: brake replacement, transponder removal, engine borescope inspection, antenna swap, flight control cable tensioning, instrument lighting repair. Classify each by system family and the category most closely associated with it, then check your reasoning against the privilege definitions you summarized from the legislation module. Where classification is genuinely uncertain, treat that uncertainty as the finding: it marks a boundary concept to study, not a gap to guess around.
Re-run the drill monthly and add harder boundary cases, such as tasks where a mechanical action triggers an avionics test.
| Decision point | Points toward mechanical-category scope | Points toward avionics-category scope |
|---|---|---|
| System involved | Structures, powerplant, mechanical controls | Instruments, radio, autopilot, avionics computers |
| Fault evidence | Wear, leaks, cracks, physical damage | Sensor, indicator, or built-in-test indications |
| Typical verification | Rigging checks, operational and ground checks | Built-in test, system-level functional indications |
| Study emphasis | Materials, maintenance practices, aerodynamics of structures | Electrical and electronic fundamentals, digital concepts |
A Four-Week Rotation With a Written Self-Check Rubric
Rotate modules in short cycles, interleaving legislation and human factors with technical modules, and measure readiness with a written rubric instead of a feeling.
Set up a four-week rotation. Weeks one and three cover two technical modules each; weeks two and four revisit those modules plus one applied module, working legislation or human factors directly into the technical content. After each rotation, write from memory: one worked example per module, one classification decision per module, and one cross-module chain, such as a corrosion finding carried through to the documentation step. Close each cycle by re-deriving the module map from the first section of this guide.
Score each module on a simple rubric: 1 means you recognize definitions when you read them; 2 means you can explain the concepts unprompted; 3 means you can solve or classify a fresh scenario correctly; 4 means you can connect the module to your category privileges and adjacent modules. These scores are learning milestones, not predictions of any exam result. When a module stalls at 2 across two cycles, change the method, for example replacing reading with scenario drilling or schematic redrawing, rather than adding hours to the same approach.
Treat the rotation as adaptable: stretch to six weeks for heavier technical modules, but never drop the cross-module chain from the cycle.
- You can restate each target module's core concepts from a blank page.
- You can classify fifteen maintenance tasks by system family with written reasoning.
- You can trace one defect-to-release chain naming responsibilities at every step.
- You can complete two fresh paper scenarios per technical module without notes.
- Your rubric shows level 3 or higher across your target modules on two consecutive cycles.
References and further reading
Use these references to explore the concepts and check the latest information from the relevant organizations.