AMC M.801 (h) Aircraft certificate of release to service
‘Endangers flight safety’ means any instance where safe operation could not be assured or which could lead to an unsafe condition. It typically includes, but is not limited to, significant cracking, deformation,  corrosion or failure of primary  structure, any evidence of burning, electrical arcing, significant hydraulic fluid or fuel leakage and any emergency   system   or   total   system failure.  An airworthiness directive overdue   for compliance is also considered a hazard to flight safety.
AMC M.802 Component certificate of release to service
When an approved organisation  maintains  an aircraft component  for use by the organisation a CAD Form 1 may not be  necessary depending upon the organisation’s internal release procedures, however all the information normally required for CAD Form 1 should be adequately detailed in the certificate of release to service.
AMC M.803 Pilot-owner authorisation
1.  
Privately operated means the aircraft is not operated pursuant to MCAR-M.201 (h) and (i).

2.  
A Pilot-owner may only issue a certificate of release to service for maintenance he/she has performed.

3.  
In the case of a jointly-owned aircraft, the maintenance programme should list:

.
The names of all Pilot-owners competent and designated to perform Pilot-owner maintenance in accordance with the basic principles described in Appendix VIII of MCAR-M. An alternative would be the maintenance programme to contain a procedure to ensure how such a list of competent Pilot-owners should be managed separately and kept current.

.
The limited maintenance tasks they may perform. 

4. An equivalent valid Pilot-owner license  may be any document attesting a pilot qualification recognised by CAD. It does not have to be necessarily issued by the CAD, but it should in any case be issued in accordance with a system acceptable to CAD. In such a case, the equivalent certificate or qualification number should be used instead of the pilot's licence number for the purpose of the MCAR-M.801(b)3 (certificate of release to service).
Subpart I AIRWORTHINESS REVIEW CERTIFICATE
AMC M.901 Aircraft airworthiness review
In order to ensure the validity of the aircraft airworthiness certificate, MCAR-M.901 requires performing periodically an airworthiness review of the aircraft and its continuing airworthiness records, which results in the issuance of an airworthiness review certificate valid for one year.
AMC M.901 (a) Aircraft airworthiness review
CAD Form 15a is issued by CAD while CAD Form 15b is issued by a MCAR-M Subpart G organisation.
AMC M.901 (b) Aircraft airworthiness review
1.  
If the continuing airworthiness of the aircraft is not managed according to a MCAR-M appendix I arrangement between the owner and the MCAR-M Subpart G organisation,

the aircraft should be considered to be outside a controlled environment. Nevertheless, such arrangement is not necessary when the operator and the MCAR-M. Subpart G organisation are the same organisation.

2.  
The fact that limited Pilot-owner maintenance as defined in MCAR-M.803 (b) is not carried out and released by an approved maintenance organisation does not change the status  of  an  aircraft  in a  controlled   environment  providing the MCAR-M Subpart G organisation under contract has been informed of any such maintenance carried out.

AMC M.901 (c) 2, (e)2 and (f) Aircraft airworthiness review
When the aircraft has remained within a controlled environment, the extension of the validity of the airworthiness review certificate does not require an airworthiness review but only a verification of the continuous compliance with MCAR-M.901 (b).
　
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