General:
This document has been developed by Civil Aviation Authority to assist applicant to comply with Commission
regulation (EC) No 2042/2003 by record his/her basic practical maintenance experience.
Objective:
Before applying for initial Part-66 aircraft maintenance licence (AML) or additional category or sub-categories to existent licence
applicant shall have acquired basic practical maintenance experience in relevant category or sub-categories.
The practical experience shall involve a representative cross section of maintenance tasks on aircraft. Applicant shall have gained
a detailed knowledge of the practical aspects and capacity to combine and apply the separate elements of knowledge in a logical
and comprehensive manner. The applicant should be able to:
- Read and understand manufacturer instructions
- Use tools and equipment as required in manufacturer instructions
- Use and have knowledge of various material, both raw and consumable, and standard parts
- Use his knowledge in a practical manner and use manufacturer instructions
- Interpret results from various sources and measurements and apply corrective action where appropriate
- Demonstrate knowledge of good maintenance standards and human factor limitation.
This document is based on ATA 100 specification principle as a way for applicant to demonstrate how he/she satisfy these
requirements.
Responsibility:
It is the responsibility of the applicant to document correctly his/her practical maintenance experience. Each task shall be
supervised and signed by qualified certifying or support staff.
Introduction:
Tasks required to log depend on what category AML is sought. Thus, the applicant has to select tasks relevant to a category or subcategories.
For example tasks required for category B2 rating needs to be more in depth related to ATA chapter 22, 23, 24, 27, 31,
34, 42, 44 and 46 than in other chapters while applicant seeking subcategory B1.3 rating needs to demonstrate work in ATA
chapters 60-67 along with other chapters.
Maintenance tasks which are considered as A, B1 and B3 are:
- Maintenance tasks performed on aircraft structure, power plant and mechanical and electrical systems
- Work on avionics systems requiring only simple tests to prove their serviceability and not requiring troubleshooting.
Maintenance tasks which are considered as B2 are:
- Maintenance tasks performed on avionic and electrical systems
- Electrical and avionics tasks within power plant and mechanical systems, requiring only simple tests to prove their
serviceability
GM 66.A.20(a) provides information about definitions for maintenance task related to Electrical system, Avionics system,
Simple test, Troubleshooting, Line maintenance and Base maintenance.
Basic experience requirements duration:
- Implementing rule 66.A.30 provides information about basic experience requirements duration applicant needs to demonstrate
when applying for initial AML.
- Appendix IV to Part 66 Implementing rule provides information about experience requirements duration applicant needs to
demonstrate when applying for extension to existing Part-66 AML with new category or sub-categories.
This logbook is constructed in a way to guide applicant to gain minimum relevant basic practical maintenance experience that represent
a cross section of maintenance activities. It is obvious that each applicant will perform more work in some ATA chapters than
in others. Thus, space given in this logbook for each ATA chapter should only been viewed as way to document minimum experience.
Additional pages are found at the end of the logbook for student to document additional work to support his/her application for
EASA Part 66 AML.
Work in all ATA chapters in this logbook does not need to be accomplished by the applicant. Each applicant has to demonstrate work in ATA chapter applicable to his/her category and sub-category.
GM66.A.20(a) Privileges
Electrical system means the aircraft electrical power supply source, plus the distribution system
to the different components contained in the aircraft and relevant connectors. Lighting systems
are also included in this definition. When working on cables and connectors which are part of
these electrical systems, the following typical practices are included in the privileges:
• Continuity, insulation and bonding techniques and testing;
• Crimping and testing of crimped joints;
• Connector pin removal and insertion;
• Wiring protection techniques.
Avionics system means an aircraft system that transfers, processes, displays or stores analogue
or digital data using data lines, data buses, coaxial cables, wireless or other data transmission
medium, and includes the system’s components and connectors. Examples of avionics systems
include the following:
• Autoflight;
• Communication, Radar and Navigation;
• Instruments (see NOTE below);
• In Flight Entertainment Systems;
• Integrated Modular Avionics (IMA);
• On-Board Maintenance Systems;
• Information Systems;
• Fly by Wire Systems (related to ATA27 “Flight Controls”);
• Fibre Optic Control Systems.
NOTE: Instruments are formally included within the privileges of the B2 licence holders.
However, maintenance on electromechanical and pitot-static components may also be
released by a B1 license holder.
Simple test means a test described in approved maintenance data and meeting all the following
criteria:
• The serviceability of the system can be verified using aircraft controls, switches, Built-in
Test Equipment (BITE), Central Maintenance Computer (CMC) or external test equipment
not involving special training.
• The outcome of the test is a unique go – no go indication or parameter, which can be a
single value or a value within an interval tolerance. No interpretation of the test result
or interdependence of different values is allowed.
• The test does not involve more than 10 actions as described in the approved maintenance
data (not including those required to configure the aircraft prior to the test, i.e.
jacking, flaps down, etc, or to return the aircraft to its initial configuration). Pushing a
control, switch or button, and reading the corresponding outcome may be considered
as a single step even if the maintenance data shows them separated.
Troubleshooting means the procedures and actions necessary, using approved maintenance
data, in order to identify the root cause of a defect or malfunction. It may include the use of
BITE or external test equipment.
Line maintenance means any maintenance that is carried out before flight to ensure that the
aircraft is fit for the intended flight. It may include:
• trouble shooting;
• defect rectification;
• component replacement with use of external test equipment, if required. Component
replacement may include components such as engines and propellers;
• scheduled maintenance and/or checks including visual inspections that will detect
obvious unsatisfactory conditions/discrepancies but do not require extensive in depth
inspection. It may also include internal structure, systems and powerplant items which
are visible through quick opening access panels/doors;
• minor repairs and modifications which do not require extensive disassembly and can
be accomplished by simple means;
• for temporary or occasional cases (Airworthiness Directives, hereinafter AD; service
bulletins, hereinafter SB) the quality manager may accept base maintenance tasks
to be performed by a line maintenance organisation provided all requirements are
fulfilled. The Member State will prescribe the conditions under which these tasks may
be performed.
Base Maintenance means any task falling outside the criteria that are given above for Line
Maintenance.
NOTE:
Aircraft maintained in accordance with "progressive" type programmes need to be individually
assessed in relation to this paragraph. In principle, the decision to allow some
"progressive" checks to be carried out is determined by the assessment that all tasks within
the particular check can be carried out safely to the required standards at the designated
line maintenance station.
The category B3 licence does not include any A subcategory. Nevertheless, this does not prevent
the B3 licence holder from releasing maintenance tasks typical of the A1.2 subcategory for
piston-engine non-pressurized aeroplanes of 2000 Kg MTOM and below, within the limitations
contained in the B3 licence.
The category C licence permits certification of scheduled base maintenance by the issue of a
single certificate of release to service for the complete aircraft after the completion of all such
maintenance. The basis for this certification is that the maintenance has been carried out by
competent mechanics and category B1, B2 and B3 support staff, as appropriate, have signed for
the maintenance tasks under their respective specialisation. The principal function of the category
C certifying staff is to ensure that all required maintenance has been called up and signed
off by the category B1, B2 and B3 support staff, as appropriate, before issue of the certificate of
release to service. Only category C personnel who also hold category B1, B2 or B3 qualifications
may perform both roles in base maintenance.