Page 35 - UK Continuing Airworthiness Regulations (Consolidated) 201121

ANNEX I - Continuing Airworthiness Requirements

Annex II (Part-145) or with Annex Vd (Part-CAO). Such maintenance shall be performed in
accordance with engine or APU maintenance data or in accordance with component
maintenance data if agreed by the CAA. Such B-rated organisation may temporarily
remove the component for maintenance if this is necessary to improve access to the
component, except where additional maintenance is required due to the removal.
Points (a) to (c) above shall not apply to components referred to in point (c) of point
21.A.307 of Annex I (Part21) to Regulation (EU) No 748/2012.
(d) Maintenance of components referred to in point (c) of point 21.A.307 of Annex I (Part 21)
to Regulation (EU) No 748/2012, where the component is fitted to the aircraft or is
temporarily removed to improve access, shall be performed by an aircraft maintenance
organisation approved in accordance with Subpart F of this Annex or with Annex II (Part-
145) or with Annex Vd (Part-CAO), as applicable, by certifying staff referred to in point
M.A.801(b)(1) or by the pilot-owner referred to in point M.A.801(b)(2). Component
maintenance performed in accordance with this point shall not be eligible for the issuance
of a CAA Form 1 and shall be subject to the aircraft release requirements provided for in
point M.A.801.
M.A.502 AMC Component maintenance
Component removal from and installation on an aircraft is considered to be aircraft maintenance and
not component maintenance. As a consequence, M.A.502 requirements do not apply to this case.
M.A.502(b) and (c) AMC Component maintenance
M.A.502(b) and (c) allow the performance of certain component maintenance, in accordance with
component maintenance data, to maintenance organisations not holding the corresponding B/C
rating and to independent certifying staff, subject to the agreement of:
- The CAA when responsible for the oversight of the maintenance organisation (refer to M.1,
paragraph 2 for M.A. Subpart F maintenance organisations, or to 145.1 for Part145
maintenance organisations, or to CAO.1 for PartCAO maintenance organisations) or,
- The CAA in the case of maintenance performed by independent certifying staff.
This should only be permitted by the CAA in the case of simple component maintenance, where the
CAA is satisfied that the certifying staff are appropriately qualified and the proper tooling and facilities
are available. It is important to note that for more complex component maintenance, special
qualifications may be required and it is not enough with holding a Part-66 aircraft maintenance
licence.
M.A.502(d) AMC Component maintenance
Independent certifying staff may issue (as established in M.A.801(b)(2)) a release to service for
maintenance that is performed outside an approved maintenance organisation. This is limited to the
maintenance of aircraft that are not required by regulation to be maintained by a Part-145 or Part-M-
Subpart-F organisation. For ELA1 aircraft maintenance, this may include complex tasks.
M.A.503 Life-limited parts and time-controlled components
(a) Installed life-limited parts and time-controlled components shall not exceed the approved
limitation as specified in the AMP and ADs, except as provided for in point M.A.504(b).
(b) When the approved limitation expires, the component shall be removed from the aircraft
for maintenance, or for disposal in the case of life-limited parts.
M.A.504 Segregation of components
(a) Unserviceable and unsalvageable components shall be segregated from serviceable
components, standards parts and materials.
(b) Unsalvageable components shall not be permitted to re-enter the component supply
system unless the mandatory life limitation has been extended or a repair solution has
been approved in accordance with Regulation (EU) No 748/2012.
M.A.504 AMC1 Segregation of components
(a) Unserviceable components should be identified and stored in a separate secure location
that is managed by the maintenance organisation until a decision is made on the future
status of such components. Certifying staff outside maintenance organisations
(M.A.801(b)(1) or M.A.801(c)) that release aircraft maintenance should send, with the
agreement of the aircraft owner/lessee, any unserviceable component to a maintenance
organisation for controlled storage. Nevertheless, the person or organisation that declared
the component unserviceable may transfer its custody, after identifying it as
unserviceable, to the aircraft owner/lessee provided that such transfer is reflected in the
aircraft logbook, or engine logbook, or component logbook.
(b) ‘Secure location under the control of an approved maintenance organisation’ refers to a
location that is managed by the approved maintenance organisation that prevents the
component from being reused or tampered with. This may include facilities that are
established by the organisation at locations different from the main maintenance facilities.
These locations should be identified in the relevant procedures of the organisation.
(c) In the case of unsalvageable components, the person or organisation should:
(1) retain such components in the secure location referred to in paragraph (b);
(2) arrange for the component to be mutilated in a manner that ensures that it is cannot
be restored for use, before disposing it; or
(3) mark the component indicating that it is unsalvageable, when, in agreement with the
component owner, the component is disposed of for legitimate non-flight uses
(such as training and education aids, research and development), or for non-
aviation applications, mutilation is often not appropriate. Alternatively to marking, the
original part number or data plate information can be removed, or a record kept of
the disposal of the component for legitimate non-flight uses.
M.A.504 GM1 Segregation of components
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