(c)
By derogation from paragraph (a), maintenance of an engine/Auxiliary Power Unit (APU) component in accordance with engine/APU maintenance data or, if agreed by the CAD, in accordance with component maintenance data, may be performed by a B rated organisation approved in accordance with MCAR-M Subpart F or MCAR-145 only whilst such components are fitted to the engine/APU. Nevertheless, such B rated organisation may temporarily remove this component for maintenance, in order to improve access to the component, except when such removal generates the need for additional maintenance not eligible for the provisions of this paragraph.

(d)
By derogation from  paragraph (a) and point MCAR-M.801(b)2, maintenance of a component while installed or temporarily removed from an ELA1 aircraft not used in commercial air transport and performed in accordance with component maintenance data, may be performed by certifying staff referred to in point MCAR-M.801(b)2, except for:

1.  
overhaul of components other than engines and propellers, and;

2.
overhaul of engines and propellers for aircraft other than CS-VLA, CS-22 and LSA.

Component maintenance performed in accordance with paragraph (d) is not eligible for the issuance of a CAD Form 1 and shall be subject to the aircraft release requirements provided for in point MCAR-M.801.’
MCAR-M.503 Service life limited components
Installed service life limited components shall not exceed the approved service life limit as specified in the approved maintenance programme and airworthiness directives, except as provided for in point MCAR-M.504(c).’
MCAR-M.504 Control of unserviceable components
(a) A component shall be considered  unserviceable in any one of the following circumstances:
1.
expiry of the service life limit as defined in the maintenance program;

2.
non-compliance with the applicable airworthiness directives and other continued airworthiness requirement mandated by CAD;

3.
absence of the necessary information to determine the airworthiness  status or eligibility for installation;

4.
evidence of defects or malfunctions;

5.
involvement in an incident or accident likely to affect its serviceability.

(b)
Unserviceable components shall be identified and stored in a secure location under the control of an approved maintenance organisation until a decision is made on the future status of such component. Nevertheless, for aircraft not used in commercial air transport other than large aircraft, the person or organisation that declared the component unserviceable may transfer its custody, after identifying it as unserviceable, to the aircraft owner provided that such transfer is reflected in the aircraft logbook or engine logbook or component logbook

(c)
Components which have reached their certified life limit or contain a non-repairable defect shall be classified as unsalvageable and shall not be permitted to re-enter the component supply system, unless certified life limits have been extended or a repair solution has been approved according to MCAR-M.304.

(d)
Any person or organisation accountable under MCAR-M shall, in the case of a paragraph

(c)
 unsalvageable components:

1.
retain such component in the paragraph (b) location, or;

2.
arrange for the component to be mutilated in a manner that ensures that it is beyond economic salvage or repair before relinquishing responsibility for such component.

(e) Notwithstanding paragraph (d) a person or organisation accountable under MCAR-M may transfer responsibility of components classified as unsalvageable to an organisation for training or research without mutilation.
SUBPART F

MAINTENANCE ORGANISATION
MCAR-M.601 Scope
This Subpart establishes the requirements to be met by an organisation to qualify for the issue or continuation of an approval for the maintenance of aircraft and components not listed in point MCAR-M.201(g).
　
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