Advisory Circular AC 66-08 v1.1: Part 66 Aircraft Engineer Licences - Privileges
Advisory Circular AC 66-08 v1.1: Part 66 Aircraft Engineer Licences - Privileges
Advisory Circular AC 66-08 v1.1: Part 66 Aircraft Engineer Licences - Privileges
AC 66-08 v1.1
Advisory Circulars are intended to provide advice and guidance to illustrate a means, but not necessarily the only
means, of complying with the Regulations, or to explain certain regulatory requirements by providing informative,
interpretative and explanatory material.
Advisory Circulars should always be read in conjunction with the relevant regulations.
Audience
This advisory circular (AC) applies to:
Purpose
This AC provides information and guidance to current and future holders of a Part 66 aircraft
maintenance engineer licence and AMOs, on the privileges of each category of a Part 66 licence.
Status
This version of the AC is approved by the Branch Manager, Airworthiness and Engineering.
Note: Changes made in the current version are not annotated. The document should be read in full.
v1.1 November 2020 Minor updates made to the category B1 and B2 licence - certification
flowcharts at Appendix C.
Unless specified otherwise, all subregulations, regulations, Divisions, Subparts and Parts
referenced in this AC are references to the Civil Aviation Safety Regulations 1998 (CASR).
Contents
1 Reference material 3
1.1 Acronyms 3
1.2 Definitions 4
References 9
2 Part 1 — General information 10
2.1 Civil aviation legislation 10
2.2 Part 66 licence categories and subcategories 10
2.3 Part 66 licence terminology 11
3 Part 2 — Licence categories and privileges 12
3.1 Part 66 licence – certification levels 12
3.2 Using a Part 66 licence to certify for completion of maintenance under CAR 13
3.3 Category A licence 13
3.4 Category B1 licence 15
3.5 Category B2 licence 20
3.6 Category C licence 23
3.7 Type rated aircraft vs non-type rated aircraft 24
4 Part 3 — Background—transition from CAR 31 to Part 66 26
4.1 The change from CAR 31 to Part 66 26
4.2 Comparison of licence privileges — CAR 31 to Part 66 26
4.3 Licence exclusions 26
4.4 Licence inclusions 30
1 Reference material
1.1 Acronyms
The acronyms and abbreviations used in this AC are listed in the table below.
Acronym Description
AC advisory circular
AMC acceptable means of compliance
AMO approved maintenance organisation
ASTM American Society for Testing and Materials
ATA Air Transport Association
1.2 Definitions
Terms that have specific meaning within this AC are defined in the table below.
Term Definition
aircraft type (a) a particular type, or type and model, of large aircraft with a particular type
of aircraft engine.
or
(b) a large aircraft with a particular type of aircraft engine.
or
(c) a small aircraft with a particular type of aircraft engine.
Note: For paragraph (b), aircraft mentioned in this paragraph are known as 'non-
rated aircraft'.
Example 1: For paragraph (a), Airbus A310(GE CF6)
Example 2: For paragraph (a), Boeing 747-400 (RR RB211)
Example 3: For paragraph (b), non-rated aircraft (PWC PT6)
Example 4: For paragraph (b), non-rated aircraft (Honeywell TPE331)
Example 5: For paragraph (c), small aircraft (PWC PT6)
Example 6: For paragraph (c), small aircraft (Honeywell TPE331)
AMO An organisation approved by CASA under Part 145 as an approved
maintenance organisation to carry out maintenance.
ATA Air Transport Association. ATA is a publication referencing standard,
commonly used for all commercial aircraft documentation.
avionic line replaceable An aircraft avionic part that satisfies all the following requirements:
unit (LRU) 1. it must have no mechanical input from, or output to, another part or
mechanism
2. it must contain only electrical, electronic, instrument or radio parts, or
software, or a combination of any such part or parts and software,
designed to provide control, monitor or display functions, or a
combination of such functions
3. it must not require any of the following in order to be installed, secured or
connected to the aircraft:
a. specialist knowledge or techniques
b. specialised equipment
c. rigging, or functional testing or adjustment, using specialised
equipment external to the aircraft or brought on board the aircraft, to
ensure that it is functioning properly.
Note: Component software loading is considered an Avionic LRU when
associated with a component removal/installation task, BUT the repair,
rebuilding and major modification of system software is not. This remains
the responsibility of the B2 LAME.
avionic system 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
• in-flight entertainment systems
• integrated modular avionics (IMA)
• cabin systems
Term Definition
Base maintenance Any task falling outside the criteria that are given in the definition for line
maintenance.
Term Definition
Rating An authorisation granted under regulation 66.080 or 66.095 of Part 66, being
a permission:
1. to perform a maintenance certification, under a category B1 or B2
licence, for maintenance carried out on a particular aircraft type; or
2. to issue a certificate of release to service, under a category B1, B2, or C
licence, for an aircraft of a particular aircraft type in relation to
maintenance carried out on the aircraft.
Simple test 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
Term Definition
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 action
even if the maintenance data shows them separated.
Notes:
1. Performing troubleshooting steps outlined in approved maintenance data
within an avionic ATA chapter which includes a wiring check — if data
does not stipulate a 'specific' result or finding (e.g. continuity, 28vdc, 500
ohms between or a range of figures or values), then any outcome of the
test is open to interpretation (i.e. not a go/no-go result) and therefore does
NOT meet the simple test criteria.
2. The total of 10 actions includes consequential actions associated with
tests of other components or systems, required by the maintenance data,
following the LRU change; e.g. if component A is replaced and the
maintenance data includes actions to test component B and system C,
the sum of all the actions for testing components A, B and system C must
be no more than 10 actions.
Single generator system A system that has one primary generating system able to provide power to all
aircraft systems, typically with a backup low capacity generator or alternator
able to provide power to essential flight system equipment.
Specialised test Test equipment designed to perform a specific function, and which requires
equipment operator training before use.
Note: If training on test equipment is required and that training is not covered
and practiced in the syllabus for the licence category training or aircraft
type training, then that test equipment is deemed to be specialised test
equipment.
Subsystem A system that works within and is part of a larger system and includes:
• the electrical subsystem comprised of electrical parts/components,
appliances and motors, within a mechanical, powerplant and structural
system
or
• the instrument system comprised of instrument and avionic
parts/components within mechanical, powerplant and structural systems.
Term Definition
References
Regulations
Regulations are available on the Federal Register of Legislation website https://www.legislation.gov.au/
Civil Aviation Orders are available on the CASA website https://www.casa.gov.au/rules-and-regulations/landing-
page/current-rules
Document Title
Part 66 of CASR Continuing airworthiness—aircraft engineer licences and ratings
Part 66 MOS Part 66 Manual of Standards
Advisory material
CASA's advisory circulars are available at http://www.casa.gov.au/AC
CASA's Civil Aviation Advisory Publications are available at http://www.casa.gov.au/CAAP
CASA's Airworthiness Bulletins are available at https://www.casa.gov.au/aircraft/airworthiness/continuing-
airworthiness/airworthiness-bulletins
Document Title
3.1.2 Within the Part 66 licensing system, there are two levels of certification of maintenance.
They are:
− a maintenance certification
− a certificate of release to service (CRS).
3.1.3 These two levels form the basis of the 'certification privileges' the holder of a Part 66
licence may exercise.
Maintenance certification
3.3.6.1 A category A licence permits the holder to perform a maintenance certification within the
scope of the subcategory of licence held if the person carried out the maintenance. The
certification privilege is limited to the category A tasks for the specific aircraft type the
licence holder has been trained on (i.e. type and task training) by the maintenance
organisation and has been endorsed for on his/her certification authorisation.
3.3.6.2 Type and task training must include practical hands-on training, and theoretical training,
as appropriate for each task authorised. Completion of training must be demonstrated
to the satisfaction of the Quality Manager of the issuing organisation by an examination
or workplace assessment carried out by the organisation.
3.4.2 Category B1 licences are issued with one or more of the subcategories B1.1, B1.2, B1.3
or B1.4 and can be endorsed with specific aircraft type ratings.
Notes:
1. For the list of subcategories, refer to paragraph 2.2.2 of this AC.
2. Refer to list of aircraft type ratings in Appendix IX of the Part 66 MOS.
3.4.2.1 Where an aircraft system (and ATA chapter reference) in Table 1 of the Part 66 MOS is
designated B1, the B1 licence holder has full maintenance privileges within the chapter.
However, a B2 licence holder has privileges for maintenance of electrical and
instrument aspects of that mechanical system. Similarly, where an aircraft system (and
an ATA chapter reference) is designated B2, the B1 licence holder has privileges for
any mechanical aspects of the system.
Avionic systems
3.4.3.3 Subject to exclusions listed on the licence, the category B1 licence may include limited
privilege to certify for work on aircraft avionic systems, provided the serviceability of the
system can be established by a simple test facility, other on-board test
systems/equipment or by simple ramp test equipment that requires no special training.
Note: Special test equipment training is other than that received during licence category training.
3.4.3.4 Defect rectification involving test equipment which requires an element of decision
making in its application – other than a simple go/no-go decision – cannot be certified
by a B1.
3.4.3.5 Avionic system privileges for the category B1 licence are limited to the following tasks:
a. replacement of an avionic LRU – that requires only a simple test to prove its
serviceability
Note: There is no LRU privilege if the licence is endorsed with the E6 exclusion.
those functional tests and adjustments that are not simple tests or requiring the
use of external specialised test equipment.
Notes:(NDT inspections using the LPI method)
1. NDT inspections using the visible colour contrast LPI method, are not to be used for final inspection of
safety critical components, and not to be used before an inspection using fluorescent penetrants.
Reference:
a. CASA Airworthiness Bulletin AWB 20-002 Use of visible (red) dye liquid penetrant with inspection of
safety critical components, and
b. the American Society for Testing and Materials (ASTM), ASTM E 1417/E1417M-16 – Standard
practice for liquid penetrant testing.
2. This NDT privilege does not include inspections using the Type I - fluorescent penetrant (visible under
ultraviolet light) inspection technique.
3. This NDT privilege is consistent with airframe category and engine category NDT inspection privileges
under the previous CAR 31 licensing system.
4. Under Appendix IV of the Part 66 MOS, licence category training for a category B1 licence delivers the
competency to carry out LPI inspections using the visible colour contrast dye penetrant technique only
(refer to competency unit MEA365).
5. For additional information on what privileges are included as part of a daily, or manufacturer's equivalent
inspection, refer to 66.A.20 (a) 4A. of the Part 66 MOS.
Maintenance certification
3.4.5.1 A category B1 licence permits the holder to perform a maintenance certification within
the scope of the subcategory of licence held (including accounting for any exclusion
listed on the licence), following maintenance performed on:
− structures (airframe)
− powerplant systems
− mechanical systems
− electrical systems
− category A tasks for the corresponding A subcategory and aircraft type rating(s)
held
− avionic systems — (see limitations for avionic privileges outlined above)
− inspections using the NDT Liquid Penetrant Inspection (LPI) method – limited to the
visible colour contrast Type II dye penetrant inspection technique only (i.e. NOT the
fluorescent dye penetrant inspection technique)
− composite structures — (see limitations for composite structure maintenance
outlined above)
− transitional privileges (VFR aircraft operations only).
3.5.2 Category B2 licences can be endorsed with specific aircraft type ratings.
Note: Refer to list of aircraft type ratings in Appendix IX of the Part 66 MOS.
3.5.3.4 As is the case for the category A licence holder, all category A task training undertaken
by a category B2 licence holder must include practical hands-on training, and
theoretical training, as appropriate for each task authorised.
Avionic systems
3.5.3.5 Certification of maintenance to the aircraft avionic systems – any level of maintenance
including replacement of avionics LRUs, (unless the licence is endorsed with the E6
exclusion).
Note: For additional guidance on category B2 certification privileges, refer to the workflow diagram (decision
tree) at Appendix C of this AC.
Maintenance certification
3.5.5.1 A category B2 licence permits the holder to perform a maintenance certification within
the scope of the licence held (including accounting for any exclusion listed on the
licence), following category B2 maintenance performed on:
− avionic systems
− electrical systems
− electrical and instrument subsystem tasks within powerplant and mechanical
systems
− category A licence tasks — i.e. minor scheduled line maintenance and simple
defect rectification within the limits of category A licence tasks specifically endorsed
on the certification authorisation issued by the employer.
Note: The category A licence tasks certification privilege is restricted to work that the licence holder has
personally performed in the maintenance organisation which issued the certification authorisation and
limited to the type ratings already endorsed on the licence.
Maintenance certification
3.6.3.1 Nil privilege. For base maintenance events, certification of maintenance is the
responsibility of category B1 and category B2 licence holders. No authorisation may be
granted to the category category C licence holder to perform a maintenance certification
following completion of base maintenance.
3.6.3.3 Only category C personnel who also hold category B1 or B2 qualifications may perform
both roles in base maintenance.
Notes:
1. Issue of a CRS by the category C licence holder, is only permitted on a particular type-rated aircraft if the
appropriate aircraft type rating is endorsed on the individual's licence.
2. The category C role and issue of a CRS in base maintenance is similar to the co-ordinator of
maintenance (CAR 31) and issue of the maintenance release.
3. Two examples of aircraft greater than 5700kgs that CASA has determined as not requiring a type rating
are: AT-802 Air Tractor, and Grumman G-73T Mallard.
Notes:
1. On your aircraft engineer licence, the exclusions, limitations and additional privileges that apply to you are
printed adjacent to the licence category or applicable aircraft type rating. To find out what they mean,
refer to the explanatory list on the last page of your licence and the additional information provided here
under section 2.6.
2. For reference, the list of licence exclusions applicable to the Part 66 licensing system is provided at
Appendix B of this AC.
4.3.3.5 The category B1 licence is a (mechanical) licence that covers maintenance performed
on aircraft structural (airframe), powerplant (engines), mechanical and electrical
(generation, distribution and lighting) systems and electrical or instrument subsystems
of mechanical, powerplant or structural systems.
In example 1 above, the CAR 31 licence was an airframe category licence only.
− because the licence holder did not have the privilege to certify for engines on their
CAR 31 airframe licence (as it was airframe only), the E3 exclusion was applied to
their Part 66 B1.1 licence at conversion, to restrict the licence holder from
certification of maintenance to powerplants (engines).
4.3.3.6 The category B1 licence is a (mechanical) licence that covers maintenance performed
on aircraft structural (airframe), powerplant (engines), mechanical and electrical
(generation, distribution and lighting) systems and electrical or instrument subsystems
of mechanical, powerplant or structural systems.
In example 2 above, the CAR 31 licence was an airframe and engine category licence
only because the licence holder did not have the privilege to certify for:
− electrical systems, (as the CAR 31 licence was airframe and engine only), the E1
exclusion was applied to the Part 66 B1 licence at conversion, to restrict the licence
holder from certification of maintenance to aircraft electrical systems
− electrical aspects of airframe or engine systems (previously a CAR 31 electrical
category privilege) as the CAR 31 licence was airframe and engine only, the E4
exclusion was applied to the Part 66 B1 licence at conversion, to restrict the licence
holder from certification of maintenance to aircraft electrical sub-systems
− instrument aspects of airframe or engine systems (previously a CAR 31 instrument
category privilege) as the CAR 31 licence was airframe and engine only, the E5
exclusion was applied to the Part 66 B1 licence at conversion, to restrict the licence
holder from certification of maintenance to aircraft instrument sub-systems.
4.3.3.7 During the licence transition period, exclusions were also applied to a Part 66 licence if
the CAR 31 licence holder did not have other maintenance privileges under their CAR
31 licence for specific aircraft sub-systems such as but not limited to: pressurisation
(E16 or E31), radar (E21), air-conditioning (E14 and/or E15), hydraulics systems (E13)
etc.
4.3.4.3 The reason behind this policy (and applied to the example above) was:
− if the CAR 31 licence holder had no evidence of having previously completed
training (theory and practical) on turbine engines, then he/she never had the
privilege to certify for turbine engines under their CAR 31 licence
− that being the case, he/she would also not be granted (at transition) any turbine
engine privileges under their Part 66 licence, and so for this example, the E3
(excluding powerplant systems) exclusion was applied to the category B1.1 licence
and therefore would have also applied to any aircraft type ratings held under that
licence.
4.3.4.4 Under this policy, any exclusion applied to the licence would first need to be removed
from the category, then from the applicable rating:
− to remove the powerplant (engine) systems exclusion from the licence category
would require completion of turbine engine training (theory and practical) – so gain
knowledge and experience of turbine engines at category level,
and then:
− to remove the powerplant (engine) systems exclusion from any aircraft type rating
held on the licence would require completion of turbine engine (theory and
practical) on the particular engine type covered by the rating – so gain knowledge
and experience for the particular turbine engine type.
Notes:
1. A list of the units of competency (for the practical experience component) taken from the Aeroskills
training package required for removal of each exclusion from a category or subcategory of licence can be
found at Appendix VIII of the Part 66 Manual of Standards.
2. This is usually completed by a CASA approved Part 147 Maintenance Training Organisation (MTO) via a
Recognition of Prior Learning (RPL) process.
Table D — List of aircraft systems, designations and conditions for Category B1 and Category B2
licences
Equipment, furnishings and Mechanical (B1) Except ELT and underwater locating
emergency equipment (ATA25) beacon (ATA 25-60) — see (ATA23).
Flight control systems (ATA27) Mechanical (B1) For a category B1 licence — except
system operation - fly-by-wire.
Flight control systems – system Avionic (B2) For a Category B2 licence — limited
operation – fly-by-wire (ATA27) to the avionic subsystem of the flight
control system.
Ice and rain protection systems Mechanical and Powerplant Powerplant — for powerplant cowling
(ATA30-20) (B1) anti-icing.
Indicating and recording systems Avionic (B2) For a Category B1 licence — avionic
(ATA31) LRU tasks.
Propeller — propulsion (ATA61) Powerplant (B1) For a Category B1 licence, only if the
holder has obtained the relevant
optional units of competency
mentioned in section 66.A.25 of the
Part 66 MOS.
Note: These optional units of
competency are marked P in
Appendix IV of the Part 66
MOS.
Fuel electronic engine control (e.g. Avionic (B2) and For Category B1 licence — avionic
FADEC) (ATA73A) Electrical (B1 and B2) LRU tasks.
A.2.1 Background
A.2.2 The move to the EASA style Part 66 maintenance engineer licensing regulations in
June 2011, resulted in the removal of the previous Extensions and Line Maintenance
Authorities (LMA’s) which existed under the previous CAR 31 licensing system. These
had previously enabled appropriately trained mechanical LAMEs some limited scope to
certify for electrical, instrument and radio systems in a Line Maintenance environment.
A.2.3 Within the Part 66 regulations adopted, the loss of this facility has been compensated
for by granting full B1 LAMEs electrical privileges and limited certification privileges on
aircraft avionic systems, provided the serviceability of the system can be established by
a simple test. The intent of these limited B1 privileges is not to replace the B2 licence.
1
Refer to chapter 1.2 – Definitions, of this AC.
A.2.15 Avionic system testing that performs a detailed examination of the calibration and
accuracy of the avionic system is considered outside the scope of the B1 licence
privilege.
A.2.16 Inspections within avionic systems require interpretation and evaluation, they are not
go/no-go decisions. They are beyond the scope of the B1 licence privilege and must be
certified by a B2 licence holder.
A.2.17 The intent of this limited privilege is to allow a category B1 licence holder to certify for a
basic functional check of an avionic system that is conducted using:
− the aircraft’s controls or switches
or
− built-in-test equipment (BITE)
or
− central maintenance computer (CMC)
or
− basic external test equipment e.g. such as multi-meters or pressure gauges– (the
training for which is normally received during licence category training)
− no more than 10 actions.
A.2.18 The outcome of the functional check must result in a unique go/no-go indication or
parameter (e.g. a single value or a value falling within a defined range of values) to
confirm serviceability, and there can be no interpretation of the results of any step
prescribed within the test procedure. Each step within the functional check must be
straight forward and simplistic in nature requiring the B1 licence holder to only have a
‘general knowledge’ level of understanding (both in the theoretical and practical aspects
of the avionic system).
A.2.19 If the steps prescribed within the test procedure go beyond the limitations for what is
described as a simple test or require greater than a 'general knowledge' level of
understanding of the avionic system to successfully carry out the test procedure, then
certification for the functional test is no longer the privilege of the category B1 licence
and must be certified by a category B2 licence.
Notes:
1. Avionic systems theory and practical (licence category and aircraft type) training requirements for a
category B1 licence are not taught to the same knowledge level of understanding as that required for the
category B2 licence.
2. Aircraft systems designated in Table 1 of section 66.A.20 of the Part 66 MOS as avionic systems are
predominately the domain of the category B2 licence, with very limited privilege granted to the category
B1 licence (only for those privileges described above, and all are reliant on the simple test obligation).
A.2.22 Only wiring checks detailed in documented troubleshooting procedures that stipulate a
specific result or finding (such as continuity, 28vdc, 500 ohms between or a range of
figures or values) may be certified by a full B1 LAME. If nothing specific is detailed,
interpretation is required and a B2 LAME must certify.
A.2.23 Troubleshooting is not to involve repeated replacement of the same LRU in pursuit of
the cause of a system fault.
A.2.24 Ongoing avionic defects with a history, once documented troubleshooting procedures
have been exhausted, should only be certified by a B2 LAME. The B2 LAME has
received training to the full level 3 system knowledge level, which allows a level of
judgement to be used in decision making.
A.3 The intent of the full category B1 licence simple test and LRU
replacement privilege
A.3.1 The intent of the simple test privilege is to enable the category B1 licence holder limited
certification privileges for maintenance carried out on the following aircraft systems
designated under Table 1 of the 66 MOS as an ‘avionic (B2)' system:
− autopilot (ATA22)
− communications (ATA23)
− flight control systems – systems operation – fly-by-wire (ATA27)
− indicating and recording systems (ATA 31)
− navigation systems, (ATA34) including
o general
o radio interface
o ACARS
o SELCAL, INS/IRS
o compass
o flight management systems
o doppler systems
− integrated modular avionics (ATA42)
− cabin systems (ATA44)
− central maintenance system (ATA45)
− information systems (ATA46)
o ATIMS
o Network server
− FADEC system (ATA73A)
− Engine indicating (ATA77).
A.3.2 Certification within the Avionic ATA chapters remains the prime responsibility of the B2
LAME. If the B1 LAME has any doubt over the scope of his/her avionic privilege or does
not believe they have the required knowledge or competency required, then certification
should be carried out by a B2 LAME.
A.3.3 The simple test: If the maintenance data requires interpretation and application of
specific avionics knowledge as part of the functional check (beyond following
instructions that are a set of steps typically found in e.g. a functional check of a CMC or
a BITE check) then the functional check must be certified by a category B2 licence.
A.3.4 The 'no more than 10 actions' rule: In support of the intent of this category B1 limited
avionics system privilege, a criteria in the definition of a simple test (ref: section 1.2 –
Definitions of this AC.) restricts the category B1 licence holder from certifying for a test
of an avionics system that involves more than 10 actions as described in the approved
maintenance data. This restriction ensures the category B1 licence holder’s privilege in
the avionics systems does not exceed his/her level of knowledge achieved on that
system.
A.5.4 Pages 3 and 4, section XII of the licence, provides the following information:
− the category and subcategory licences granted to the holder of the licence and the
exclusions applicable to each category/subcategory
− the aircraft type rating endorsements applicable to and listed under each
category/subcategory licence and the exclusions applicable to and listed against
each aircraft type rating.
A.5.5 Page 5, section XIV of the licence, provides the following information:
− the list of code references for additional privileges, limitations or exclusions that
apply to the licence holder.
Example 2: section XIV – understanding the additional privileges and exclusions applied to the
licence
A.5.6 Pages 6, 7 and 8 of the licence are intentionally left blank with no further entries on
these pages.
Engine category and Subcategory B1.x and type Excluding powerplant systems E3
engine type rating rating
Electrical category and Subcategory B1.x and type Excluding electrical sub-system E4
type rating rating of mechanical, powerplant or
structural systems
CAR 31 cross category Subcategory B1.x, category B2, Excluding avionic LRUs E6
privilege for type rating
engine/airframe; or CAR
31 licence with radio or
instruments categories
CAR 31 licence with category B2, type rating Excluding instrument aspect of E7
instruments category avionics systems - ATA 22, 27,
rating 31 and 34
CAR 31 licence with radio category B2, type rating Excluding radio aspect of E8
category rating avionics systems - ATA 23, 34
and 44
Radio group 2 or radio Subcategory B1.x or category B2 Excluding audio CVR systems E11
group 20
Engine group 3 or piston Subcategory B1.2 or B1.4 Excluding all supercharging E33
engine group 21 systems
CAR 31 licence with a Subcategory B1.x, category B2 Excluding digital systems E34
digital limitation