145.A.50 Certification of
maintenance
Regulation
(EU) 2021/1963
(a) A certificate of release to service shall
be issued by appropriately authorised certifying staff on behalf of the
organisation when that certifying staff has verified that all the maintenance
that was ordered has been properly carried out by the organisation in
accordance with the procedures specified in point 145.A.70,
taking into account the availability and use of the maintenance data specified
in point 145.A.45, and that there are no known non-compliances
which endanger flight safety.
(b) A certificate of release to service shall
be issued before flight at the completion of any maintenance.
(c) New defects or incomplete maintenance
work orders identified during the maintenance shall be brought to the
attention of the person or organisation responsible for the aircraft
continuing airworthiness for the specific purpose of obtaining agreement to rectify
such defects or completing the missing elements of the maintenance work order.
In the case where that person or organisation declines to have such
maintenance carried out under this point, point (e) is applicable.
(d) A certificate of release to service shall
be issued by appropriately authorised certifying staff on behalf of the
organisation after the maintenance that was ordered has been carried out on a
component whilst it was off the aircraft. The authorised release certificate
“EASA Form 1” referred to in Appendix II of Annex I (Part-M) constitutes the
component certificate of release to service except if otherwise specified in
point M.A.502 of Annex I (Part-M) or ML.A.502 of
Annex Vb (Part-ML), as applicable. When an organisation maintains a component
for its own use, the EASA Form 1 may not be necessary if the organisation’s
internal release procedures in its MOE so provides.
(e) By derogation to point (a), when the
organisation is unable to complete all maintenance ordered, it may issue a
certificate of release to service within the approved aircraft limitations.
The organisation shall enter such fact in the aircraft certificate of release
to service before the issue of such certificate.
(f) By way of derogation from point
145.A.50(a) and point 145.A.42, when an aircraft is grounded at a
location other than the main line station or main maintenance base due to the
non-availability of a component with the appropriate release certificate, the
organisation contracted for the maintenance of that aircraft may temporarily
fit a component without the appropriate release certificate for a maximum of
30 flight hours or until the aircraft first returns to the main line station
or main maintenance base, whichever is the sooner, subject to the agreement of
the person or organisation responsible for the aircraft’s continuing
airworthiness and subject to that component having a suitable release
certificate but otherwise in compliance with all applicable maintenance and
operational requirements. Such components shall be removed by the time limit
provided for in the first sentence of this point unless an appropriate release
certificate has been obtained in the meantime under points 145.A.50(a) and 145.A.42.
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