Physical inspection of the aircraft is required at each ACAM Inspection, therefore the verifications are exclusively on-site. If a consistent, detailed and precise documentation is already available at ENAC, can be evaluate in advance by the inspector, in order to facilitate the activities with the owner/operator during the inspection. Indicatively, except for preparation and post-inspection time frame (assessment of approval and effectiveness of corrective actions in relation to the identified root cause), or special cases, an in-depth ACAM verification of a complex aircraft should be performed in two days, while for other simple aircraft should be sufficient one day. In-flight verifications may be associated with each of these inspections when necessary; when it is not possible to complete airworthiness inspections in flight (flight inspection) on the ground are performed.