Review of Commission Implementing Regulation - 2020/1159 of 5 August 2020 amending Regulations (EU) No 1321/2014 and (EU) No 2015/640 as regards the introduction of new additional airworthiness requirements
An aircraft, the design of which has already been certified, is not required to comply with an updated version of CS when it is produced or while in service.
Therefore compliance of such aircraft with additional airworthiness requirements that were not included in the initial CS at the time of certification of design should be introduced.
The limit of validity (LOV) represents an operational limit based on fatigue test evidence that supports the maintenance program. The FAA defines the LOV as “the period of time (in flight cycles, flight hours, or both) up to which it has been demonstrated by test evidence, analysis and, if available, service experience and teardown inspections, that widespread fatigue damage will not occur in the airplane structure.” It is further defined as the point in the structural life of an airplane at which there is significantly increased risk of uncertainties in structural performance and probable development of WFD.
Once the airworthiness limitations containing the LOV are approved by the FAA, an airplane may not operate beyond the LOV.
