Home > Licence and Certificates
HKAR-66 Aircraft Maintenance Licence
The information below helps new applicants understand the experience and examination requirements for a HKAR-66 licence. As such it is a guide only and readers should refer to HKAR-66 for the detailed requirements before applying. The effective and compliance dates of HKAR-66 are 1 April 2002 and 1 April 2004 respectively. HKAR-66 is available from the Flight Standards and Airworthiness Division of Hong Kong Civil Aviation Department (CAD).
HKAR-66 is a set of requirements
for the qualification of aircraft maintenance staff by the
issue of an Aircraft Maintenance Licence. Whilst this licence
is intended to be used as the basis for a HKAR-145 Approved
Maintenance Organisation to issue a Certification Authorisation,
the "basic" element of the licence may be considered
as providing a qualification in aircraft maintenance that
demonstrates the achievement of an underpinning level of
knowledge and competence. HKAR-66 is applicable to the release
to service of aeroplanes and helicopters for all weights.
A Category A Licence is intended to be
the basis for Limited Authorisation allowing an experienced
and knowledgeable mechanic to be authorised to certify certain
simple inspections and routine tasks. It is not intended
that the Category A licence is used alone to support line
maintenance activities. The Category A licence does not
carry any type ratings but, following appropriate task training
within a HKAR-147 or HKAR-145 approved organisation, may
be used as the basis for a certification authorisation for
certain prescribed tasks.
The experience requirements vary according to the amount and type of training received but must be relevant to the sub category of licence and must satisfy certain criteria in respect of recency. The experience for Category A is as follows:
The Category B Licence will be the mainstay licence qualification for aircraft maintenance staff under the Hong Kong Aviation Requirements. Category B licence are available in both mechanical and avionic disciplines with sub categories as for Category A. Although primarily for line maintenance use at Engineer level, it is intended that certain base maintenance staff who do not issue a Certificate of Release to Service (CRS), but who contribute to the final CRS issue by the Category C engineer, will also be required to hold a Category B1 or B2 licence as appropriate.
The sub categories for Category B Line Maintenance Certifying Engineer/Base Maintenance Engineer are:
Category B1 is mechanically orientated
and covers aircraft structure, airframe systems, engines
and propellers or rotors as appropriate. The licence holder
will also be able to certify all electrical work including
power and distribution systems and control and indication
systems for systems within their privileges. Additionally
a capability for authorisation for the replacement of avionic
line replaceable units, requiring simple tests to prove
serviceability, may be held.
The experience required must be maintenance
experience of operating aircraft appropriate to the licence
category of sub category being applied for.
The Category C licence is considered more of a qualification related to the management of maintenance during base maintenance. It is not a licence which allows the holder to perform detailed inspections, diagnosis and replacements which collectively make up a base maintenance input. The Category C certifier will be supported by appropriately qualified B1 and B2 engineers who carry out these tasks and who verify and sign that they have been completed properly. The Category C licence is intended to be used to certify the process of maintenance, built upon the experience and knowledge of the individual and their ability to manage the input. As such, the route to qualification may be either from a mechanical or avionic background as a Category B1 and B2 licence holder or the equivalent position in base maintenance, a base maintenance engineer/technician.
An alternative qualification path is available based on a qualification at degree level in an appropriate discipline acceptable to the CAD. Acceptance will take into consideration the university which issued the degree and the course content. The degree by itself does not meet the whole qualification as there are additional experience and examination requirements to be satisfied. Graduates may not hold a Category B1 or B2 licence without meeting the 5 years minimum maintenance experience required for that Category.
The experience requirements for Category C are as follows:
Knowledge Requirements and Examinations
The knowledge requirements are shown in
modular format in HKAR-66 Appendix 1.
Table 1 Syllabus subject modules
The multi-choice examinations are arranged according to the modules shown in Tables 1 and 2. Examinations are to be conducted by CAD. Candidates must achieve a minimum of 75% in any examination to pass. Modules may be taken singly or in combinations in any order. While an incremental approach may appear more attractive, it may ultimately prove more expensive and time consuming. Once passed, modules are held in credit for a period of 5 years. If all the modules required for licence issue and the appropriate experience are not gained during this period with a successful application for licence issue being made, the examinations have to be repeated. Seventy five seconds are allowed for each multi choice question. Essay papers will consist of four questions, with 20 minutes allowed for each question, drawn from the subjects in modules 7, 9 and 10.
Table 2 Syllabus module applicability
* This module is not applicable to Category A
Aircraft Type Endorsements
Holders of HKAR-66 Aircraft Maintenance
Licences in Category B1, B2, B3 and C may apply for inclusion
of an Aircraft Type Rating subject to meeting certain requirements.
These are the completion of a HKAR-147 Approved Type Training
Course on that type OR an aircraft type training approved
by the Director-General of CAD, covering the subjects appropriate
to the licence category being endorsed and those topics
listed in HKAR 66.45 and the associated AMC/IEM. A minimum
period of practical experience is required on the aircraft
type prior to application.
Licence Certification Privileges
A type rated HKAR-66 Aircraft Maintenance
Licence normally does not confer any certification privileges
on the holder in their own right. Such licence must be used
in conjunction with a HKAR-145 certification authorisation.
Logbooks and records
Whilst not mandatory, CAD advises all candidates to maintain log books or records on a progressive basis to support any subsequent licence application. Entries should be made periodically to show periods of work, the nature of the work, the aircraft type involved and such records should be countersigned by a suitable referee. This may be a supervisor, quality manager or HKAR-66 licence holder. For aircraft type ratings a record of the tasks undertaken on the type being applied for will allow CAD to consider the adequacy of the applicant's practical experience in relation to the requirements of HKAR 66.45. CAD may request details of a candidate's experience for perusal.
There is provision under HKAR-66 for exemptions from some of the knowledge or experience requirements for applicants who have any of the following:
1. Proof of previous qualification as a skilled worker in a trade acceptable to the
2. An ICAO Aircraft Maintenance Licence.
3. Academic examinations or qualifications recognised or acceptable to the CAD.
4. University degrees in an appropriate discipline and as accepted by the CAD.
Please note that none of these has yet been agreed and an evaluation will be required by CAD before any can be accepted as a standard or exemption. CAD may charge for the cost of any such assessment.
Those intending to obtain a HKAR-66 licence should determine which examination modules they need to pass at the level appropriate to the licence category sought. They may apply on CAD application form for examination. There is no oral examination. Once all written examinations have been passed, applicant should submit the experience to apply for grant of licence. Examination and grant of Licence application forms are available from Personnel Licensing Office or CAD website. All appropriate sections of the form must be completed: failure to do so will result in the application being rejected. The form must be countersigned by a suitable referee and supported by any certificates of examination, records of experience and proof of other qualifications where exemptions are being claimed. The CAD reserves the right to require additional confirmation of details if necessary.
Any enquiries related to aircraft maintenance licensing may be made to:
Civil Aviation Department