145.A.50 Certification of maintenance

• Regulation (EU) 2021/1963 found in: Continuing Airworthiness (1321/2014) Part-M Part-145 Part-66 Part-147 Part-T Part-ML Part-CAMO Part-CAO (Jul 2024)

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](#_DxCrossRefBm1518545374), taking into account the availability and use of the maintenance data specified in point [145.A.45](#_DxCrossRefBm1518545005), 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](#_DxCrossRefBm1518545007) of Annex I (Part-M) or [ML.A.502](#_DxCrossRefBm1518545097) 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](#_DxCrossRefBm1518545200), 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](#_DxCrossRefBm1518545200). #### 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](#_DxCrossRefBm1203440261), taking into account the availability and use of the maintenance data specified in point [145.A.45](#_DxCrossRefBm1203439892), 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](#_DxCrossRefBm1203439894) of Annex I (Part-M) or [ML.A.502](#_DxCrossRefBm1203439984) 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](#_DxCrossRefBm1203440087), 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](#_DxCrossRefBm1203440087).