EASA Part 66 B1.1 vs B2 — Which Should You Choose?

EASA Part 66 is the European standard for aircraft maintenance engineers — recognised in more than 30 countries across Europe, the Middle East, and beyond. For Indian engineers considering a career in global aviation maintenance, two licence categories stand above the rest: B1.1 (mechanical and structural, fixed-wing turbine aircraft) and B2 (avionics, electrical and electronic systems). Choosing between them is consistently one of the first and most important questions from students joining Vajra Aviation's EASA programme in Bangalore.

This guide gives you a complete, practical comparison — scope of work, module structure, career destinations, salary benchmarks, and a clear recommendation tailored to Indian engineering graduates in 2026.

What is EASA Part 66?

EASA Part 66 is the European Union Aviation Safety Agency's licensing regulation for aircraft maintenance technicians and engineers. It defines the qualifications, examinations and practical experience required before an engineer can be authorised to certify that an aircraft is airworthy following maintenance — known as issuing a Certifying Staff approval or signing the Certificate of Release to Service (CRS). The full regulatory requirements and module syllabi are published on the EASA Part 66 official page.

The regulation divides maintenance engineers into categories based on the type of work they are authorised to perform:

• Category A — Line maintenance mechanic; task-specific certifications under supervision
• Category B1 — Mechanical systems certifying engineer (sub-categories: B1.1 turbine aeroplanes, B1.2 piston aeroplanes, B1.3 turbine helicopters, B1.4 piston helicopters)
• Category B2 — Avionics systems certifying engineer
• Category C — Base maintenance certifying engineer (requires prior B1 or B2 experience)

Unlike India's DGCA AME licence (which is valid only for Indian-registered aircraft), an EASA Part 66 licence is accepted by aviation authorities across the European Union, the UK (post-Brexit under bilateral agreements), the UAE, Singapore, and dozens of other states that have adopted EASA standards. This global portability is the central value proposition for Indian engineers. The growing demand for qualified aviation maintenance engineers in India is further supported by the Boeing Commercial Market Outlook, which forecasts a need for over 18,000 new maintenance technicians across South Asia through 2043.

EASA Part 66 B1.1 — The Mechanical Category

Full name: B1.1 — Turbine-powered aeroplane maintenance (Mechanical)

The B1.1 licence is the mechanical engineer's authorisation in the EASA world. A B1.1 certifying staff holder can sign off maintenance tasks on the airframe, engines, mechanical and structural systems of turbine-powered fixed-wing aircraft — the Airbus A320 family, Boeing 737, ATR 72, and every other turbine aeroplane type that dominates commercial aviation today.

What B1.1 Covers

• Airframe structures — fuselage, wings, empennage, control surfaces
• Turbine engines — power plants, nacelles, engine mounts, thrust reversers
• Mechanical systems — flight controls, flaps, slats, spoilers
• Pneumatic and pressurisation systems
• Fuel systems — tanks, pumps, lines, fuel quantity indicating
• Hydraulic systems — power generation, actuation, landing gear
• Landing gear — structure, actuation, braking, steering
• Ice and rain protection systems
• Electrical systems (limited — sufficient for B1.1 tasks; full avionics reserved for B2)

B1.1 Module Structure

The B1.1 category requires 13 core modules, with the specialist module being Module 11A — Turbine Aeroplane Aerodynamics, Structures and Systems. This module is the most comprehensive in the B1.1 curriculum, covering every major aircraft system from the perspective of a certifying maintenance engineer.

Who Should Choose B1.1?

• Students and graduates with a background in Mechanical Engineering, Aeronautical Engineering, or Production Engineering
• Candidates with a hands-on interest in engines, structures, and physical aircraft systems
• Those targeting employment with large commercial airlines, MRO hangars, or base maintenance facilities

Career Destinations — B1.1

B1.1 certifying staff are employed across the broadest range of aviation maintenance operations. Typical employers include:

• Lufthansa Technik — one of the world's largest independent MROs, with facilities in Hamburg, Malta, Philippines and other locations
• Air France KLM Engineering & Maintenance — European MRO with extensive B1.1 recruitment
• Etihad MRO — Abu Dhabi's airline engineering subsidiary, a major recruiter of EASA B1.1 engineers from India
• GMR Aero Technic — India's growing international MRO at Hyderabad; EASA approvals in process
• Emirates Engineering, flydubai, Air Arabia Engineering (UAE)
• European regional airline maintenance teams

EASA Part 66 B2 — The Avionics Category

Full name: B2 — Avionics maintenance

The B2 licence is the avionics engineer's certification in the EASA framework. A B2 certifying staff holder is authorised to sign off maintenance tasks on avionics systems, electrical systems, digital systems, instruments, communications and navigation equipment across all aircraft types — from narrow-body commercial jets to wide-body long-haul aircraft.

What B2 Covers

• Avionics systems — Flight Management Systems (FMS), autopilot, ACARS
• Electrical power systems — generators, batteries, power distribution
• Digital systems — data buses (ARINC 429, ARINC 629), Built-In Test Equipment (BITE)
• Instruments — air data systems, attitude indicators, EFIS displays
• Communications — VHF/HF radio, SATCOM, interphone systems
• Navigation — VOR, ILS, GPS, ADS-B, weather radar
• In-flight entertainment and cabin systems (IFE)
• Wiring, bonding and shielding on all aircraft electrical systems

B2 Module Structure

The B2 category also requires 13 core modules, with emphasis on electrical and avionics modules. The specialist module is Module 13 — Aircraft Aerodynamics, Structures and Systems (B2 variant), which covers all aircraft systems from the avionics perspective. Modules 3 (Electrical Fundamentals), 4 (Electronic Fundamentals) and 5 (Digital Techniques) carry particular weight in B2 preparation.

Who Should Choose B2?

• Students and graduates with a background in Electronics Engineering, Electrical Engineering, or Instrumentation Engineering
• Candidates drawn to avionics, digital systems, and the rapidly evolving technology landscape of modern aircraft
• Those targeting employment at avionics OEMs, specialist avionics MROs, or airline avionics departments

Career Destinations — B2

• Thales — global avionics OEM with avionics maintenance and modification centres across Europe and the Gulf
• Honeywell Aerospace — avionics systems, engines and maintenance services; major B2 employer
• Collins Aerospace — avionics and cabin systems; one of the world's largest aerospace companies
• Airline avionics departments (IndiGo, Air India, Emirates avionics workshops)
• Independent avionics shops and EASA Part 145 avionics MROs in Europe and the Middle East

B1.1 vs B2 — Head-to-Head Comparison

The table below distils the key differences to help you make an informed choice.

Which is Better — B1.1 or B2?

There is no universally correct answer, but there are clear indicators based on your background, interests, and career goals.

Choose B1.1 if:

• Your degree or training is in Mechanical, Aeronautical, or Production Engineering
• You are drawn to engines, structures, and physical aircraft systems
• You want the widest possible range of MRO job opportunities globally
• You are targeting line maintenance roles at commercial airlines

Choose B2 if:

• Your background is in Electronics, Electrical, or Instrumentation Engineering
• You are interested in avionics technology, digital systems, and the evolving suite of modern aircraft electronics
• You are targeting avionics OEMs (Thales, Honeywell, Collins) or specialist avionics MROs

Consider Both B1.1 + B2:

Many experienced EASA engineers hold both licences. A dual B1.1 + B2 engineer is exceptionally employable — able to certify the full scope of aircraft maintenance tasks without needing a second certifying staff signature. At Vajra Aviation, both B1.1 and B2 are taught under one roof, making it practically possible to pursue both simultaneously and graduate with dual-category capability.

EASA Part 66 in India — Career Scope 2026

India's aviation expansion is creating structural demand for EASA-certified maintenance engineers at a pace Indian training has not yet matched:

• IndiGo has placed orders for 500+ aircraft and operates a fleet exceeding 300 aircraft — the largest in India and among the largest in Asia. International fleet maintenance agreements require EASA certifying staff
• Air India (Tata group) is undergoing its most significant fleet and service transformation in decades, with wide-body aircraft joining the fleet and MRO capability being rebuilt
• Akasa Air is growing its Boeing 737 MAX fleet and will require EASA-certified engineers for fleet maintenance in EASA-regulated environments
• India's MRO market is projected to reach USD 4+ billion by 2030, with major international MROs establishing or expanding India facilities — all requiring EASA Part 145 approvals and EASA-certified certifying staff

The Middle East remains the single largest destination for Indian EASA engineers. The UAE alone (Emirates Engineering, Etihad MRO, flydubai, Air Arabia Engineering, and dozens of third-party MROs at Dubai, Abu Dhabi and Sharjah airports) recruits more than 2,000 EASA-certified engineers annually from South Asia, with Indian candidates consistently preferred for their technical qualifications and English proficiency.

Oman, Qatar, Kuwait, and Bahrain have similarly active aviation maintenance sectors. EASA Part 66 is the entry standard for all of them.

How Vajra Aviation Prepares You for EASA Part 66

Vajra Aviation's EASA Part 66 programme is built on a foundation that no other training centre in India can replicate:

• Aviotrace Swiss Partnership: As India's only authorised Aviotrace Swiss partner, Vajra Aviation provides official module materials, structured examination preparation, and mock CBT papers directly aligned to the EASA Part 66 examination standard. Aviotrace Swiss is an established European Part 147 organisation whose examination materials are used across EASA jurisdictions
• Chief Instructor — Wg Cdr V Sundaram (Retd): Our lead EASA instructor is a retired Wing Commander with extensive IAF and civil aviation experience, holding both DGCA and EASA qualifications. His operational depth means our teaching goes beyond textbook content to the practical realities of MRO certifying staff responsibilities
• Both B1.1 and B2 Under One Roof: Students can study both categories simultaneously at Vajra Aviation, progressing through shared foundation modules before diverging into category-specific content — maximising time efficiency
• Dual DGCA + EASA Track: For students who want both Indian and international licence eligibility, Vajra Aviation offers a structured dual-track programme covering both DGCA AME and EASA Part 66 module requirements concurrently
• Module-by-Module Mock Tests: Every module concludes with CBT-format mock examinations under timed conditions, replicating the actual EASA examination environment. Students who sit mock tests consistently outperform those who rely on reading alone
• Bangalore's Only Authorised Centre: Bangalore is India's aviation hub — home to HAL, Hindustan Aeronautics Limited, multiple DGCA and EASA-approved MROs, and major aerospace OEMs. Training at Vajra Aviation puts students at the centre of India's most active aviation market

Frequently Asked Questions — EASA Part 66 B1.1 vs B2