EASA Part66 Exam Preparation Online
Practice with thousands of EASA Part66 exam questions across all 17 modules, track your progress, and join a community of aviation maintenance engineers preparing for their licence. New to it? Read what EASA Part 66 is — the licence, modules and exams explained.
All content aligned with the latest Commission Implementing Regulation (EU) 2023/989 — covering categories A, B1, B2, B2L and B3. Also fully applicable to UK CAA Part66 candidates — the UK keeps the same Part66 modules, exams and 75% pass mark under UK Regulation (EU) No 1321/2014. UK CAA vs EASA → Valid prep for Australia's CASA Part 66 self-study exams too. CASA vs EASA →
Part-66 worldwide: the same module-based study also prepares you for Part-66-aligned exams in the UAE (GCAA CAR-66), Singapore (SAR-66), Hong Kong (HKAR-66) and India (DGCA CAR-66).
Aircraft Type Training: practice question banks for the Airbus A320 (CEO & NEO), A220 and A330 and Boeing 737NG, 737 MAX and 787, organised by ATA chapter with worked answers and timed practice.
Fact of the Day
14. PropulsionEICAS colour codes: red for warnings requiring immediate action, amber for cautions, white for advisory information.
Study Modules
1. Mathematics
1062 questions
2. Physics
997 questions
3. Electrical fundamentals
1242 questions
4. Electronic fundamentals
876 questions
5. Digital techniques / Electronic instrument systems
1095 questions
6. Materials & hardware
1209 questions
7. Maintenance practices
1391 questions
8. Basic aerodynamics
1120 questions
9. Human factors
746 questions
10. Aviation legislation
500 questions
11. Aeroplane aerodynamics, structures and systems
2137 questions
12. Helicopter aerodynamics, structures and systems
1281 questions
13. Aircraft aerodynamics, structures and systems
955 questions
14. Propulsion
660 questions
15. Gas turbine engine
1377 questions
16. Piston engine
500 questions
17. Propeller
802 questions
Module 1
Mathematics
6 articles
Module 2
Physics
8 articles
Module 3
Electrical Fundamentals
18 articles
Module 4
Electronic Fundamentals
5 articles
Module 5
Digital Techniques / Electronic Instrument Systems
15 articles
Module 6
Materials and Hardware
16 articles
Module 7
Maintenance Practices
27 articles
Module 8
Basic Aerodynamics
4 articles
Module 9
Human Factors
10 articles
Module 10
Aviation Legislation
10 articles
Module 11
Aeroplane Aerodynamics, Structures and Systems
54 articles
Module 12
Helicopter Aerodynamics, Structures and Systems
22 articles
Module 13
Aircraft Aerodynamics, Structures and Systems
46 articles
Module 14
Propulsion
8 articles
Module 15
Gas Turbine Engine
22 articles
Module 16
Piston Engine
16 articles
Module 17
Propeller
7 articles
Unlock all study notes — €99.99 one-time
900+ pages, 17 modules, lifetime access. First paragraph of each module is free to preview.
Aircraft Type Training
Airbus A320 - CEO
43 ATA chapters · 4,451 questions
Airbus A320 - NEO
24 ATA chapters · 2,406 questions
Airbus A220 (BD500)
42 ATA chapters · 4,332 questions
Boeing 737NG
27 ATA chapters · 4,384 questions
Boeing 737NG to MAX Diff
30 ATA chapters · 3,194 questions
Airbus A320 to A330 Diff
23 ATA chapters · 2,392 questions
Boeing 787 (GEnx)
34 ATA chapters · 4,423 questions
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Recent Q&A Activity
8x the Diameter is for an unsupported cable, any less then this and you run the risk of flattening the dielectric plates and degrading the centre conductor. however 3x is acceptable when the cable is supported along it's run through out the bend.
Rhysfaulkner96 replied to Jordi's question ·10h ago
because when you but a capacitor in series the capacity eq will be lower than the smaller one, here we have a capacitor of 3 Farad the question is: "how i must to connect another capacitor for have a total capacitance of 2 Farad?" If you put a capacitor of 6 Farad IN SERIES with a 3 Farad if you apply the correct formula: 1/Cx plus 1/Cy = 1/C equivalent
Tudorache replied to MohamedR04's question ·1d ago
My humble opinion.No because a radial bearing is also known as a journal bearing so its load is radial, compression should mean that it squishes it.
Ody balsa replied to android811's question ·2d ago
The correct option is C. When the card is removed while still installed, you must sit at the same potential as the aircraft structure the assembly is referenced to, so any static charge bleeds away through a controlled low current path instead of discharging through the sensitive component; bonding only to the assembly leaves both of you floating relative to the airframe. Refer to Module 5.12 electrostatic sensitive devices, where grounding personnel to aircraft structure is the specified precaution.
Devraj_S replied to Stavros 's question ·7d ago
A cold day is better than a hot one because the cold day has more density in air so more lift, and dry because the wet day decrease engine efficiency
Merejohn replied to Elia's question ·7d ago
Why isn’t B the correct answer
Stavros asked a question ·7d ago
It's C. We lean on those ISA numbers all the time when we set altimeters and read engine performance against deviation from standard, 15 degrees C and 1013 millibars at sea level. The whole model is built on average mid latitude air, so 45 degrees is the datum, not the equator.
Tomash replied to Prodromos's question ·8d ago
Why
Prodromos asked a question ·8d ago
How else would the nose come up if the tail isn't pushing down harder? It's A, decreasing the tailplane incidence loads the tail down more, so the tail drops and the nose pitches up. Heads up though, the other two options are basically saying the same thing, raising and increasing the incidence, so one of them looks like a typo.
carlosmd replied to jawad ismail's question ·11d ago
please explain
jawad ismail asked a question ·11d ago