Sofema Online (www.sofemaonline.com) considers the continuing airworthiness obligations based on compliance with EASA Basic regulation EC 2018/1139

ANNEX II Essential Requirements for Airworthiness

1.5. Continuing airworthiness

1.5.1. All necessary documents including instructions for continuing airworthiness must be established and made available to ensure that the airworthiness standard related to the aircraft type and any associated part is maintained throughout the operational life of the aircraft.

1.5.2. Means must be provided to allow inspection, adjustment, lubrication, removal or replacement of parts and non- installed equipment as necessary for continuing airworthiness.