AMC 66.A.20(b)(2) Privileges    

CAA ORS9 Decision No. 1

The 6 months of maintenance experience in the preceding 2-year period should be understood as consisting of two elements, duration and nature of the experience. The minimum to meet the requirements for these elements may vary depending on the size and complexity of the aircraft and type of operation and maintenance.

1. Duration:

Within an approved maintenance organisation:

    — 6 months of continuous employment within the same organisation; or

    — 6 months split up into different blocks, employed within the same or in different organisations.

The 6-month period can be replaced by 100 days of maintenance experience in accordance with the privileges, whether they have been performed within an approved organisation or as independent certifying staff according to M.A.801(b)1, or as a combination thereof.

When a licence holder maintains and releases aircraft in accordance with M.A.801(b)1, in certain circumstances this number of days may even be reduced by 50% when agreed in advance by the CAA. These circumstances consider the cases where the licence holder happens to be the owner of an aircraft and carries out maintenance on his/her own aircraft, or where a licence holder maintains an aircraft operated for low utilisation, that does not allow the licence holder to accumulate the required experience. This reduction should not be combined with the 20% reduction permitted when carrying out technical support, or maintenance planning, continuing airworthiness management or engineering activities. To avoid a too long period without experience, the working days should be spread over the intended 6-month period.

2. Nature of the experience:

Depending on the category of the aircraft maintenance licence, the following activities are considered relevant for maintenance experience:

    — Servicing;

    — Inspection;

    — Operational and functional testing;

    — Trouble-shooting;

    — Repairing;

    — Modifying;

    — Changing component;

    — Supervising these activities;

    — Releasing aircraft to service.

For category A licence holders, the experience should include exercising the privileges, by means of performing tasks related to the authorization on at least one aircraft type for each licence subcategory. This means tasks as mentioned in AMC 145.A.30(g), including servicing, component changes and simple defect rectifications.

For category B1, B2, B2L, B3 and L, for every aircraft included in the authorisation the experience should be on that particular aircraft or on a similar aircraft within the same licence (sub)category. Two aircraft can be considered to be similar when they have similar technology, construction and comparable systems, which means equally equipped with the following (as applicable to the licence category):

    — Propulsion systems (piston, turboprop, turbofan, turboshaft, jet-engine or push propellers); and

    — Flight control systems (only mechanical controls, hydro-mechanically powered controls or electro-mechanically powered controls); and

    — Avionic systems (analogue systems or digital systems); and

    — Structure (manufactured of metal, composite or wood). For licences endorsed with (sub)group ratings:

    — In the case of a B1 licence endorsed with (sub)group ratings (either manufacturer sub- group or full (sub)group) as defined in 66.A.45, the holder should show experience on at least one aircraft type per (sub)group and per aircraft structure (metal, composite, wood).

    — In the case of a B2 or B2L licence endorsed with (sub)group ratings (either manufacturer subgroup or full (sub)group) as defined in 66.A.45, the holder should show experience on at least one aircraft type per (sub)group.

    — In the case of a B3 licence endorsed with the rating ‘piston-engine non-pressurised aeroplanes of 2000 kg MTOM and below’ as defined in 66.A.45, the holder should show experience on at least one aircraft type per aircraft structure (metal, metal-tubing with fabric, composite, wooden).

For category C, the experience should cover at least one of the aircraft types endorsed on the licence.

For a combination of categories, the experience should include some activities of the nature shown in paragraph 2 in each category.

A maximum of 20% of the experience duration required may be replaced by the following relevant activities on an aircraft type of similar technology, construction and with comparable systems:

    — Aircraft maintenance related training as an instructor/assessor or as a student;

    — Maintenance technical support/engineering;

    — Maintenance management/planning.

The experience should be documented in an individual log book or in any other recording system (which may be an automated one) containing the following data:

    — Date;

    — Aircraft type;

    — Aircraft identification i.e. registration;

    — ATA chapter (optional);

    — Operation performed e.g. 100 FH check, MLG wheel change, engine oil check and complement, SB embodiment, trouble shooting, structural repair, STC embodiment, etc.;

    — In the particular case of Part-145 organisations, the type of maintenance i.e. base, line;

    — Type of activity i.e. perform, supervise, release;

    —    Subcategory used (A1, A2, A3, A4, B1.1, B1.2, B1.3, B1.4, B2, B2L, B3, C or L1, L1C, L2, L2C, L3G, L3H, L4G, L4H, L5);

    — Duration in days or partial-days.