![]() ![]() As airplanes age, both the number and age of the existing repairs increase.Unlike the performance of the original structure where the behaviour may be predicted from tests and from experience on other airplanes in service, the behaviour of a repair and its effect on the fatigue characteristics are generally not known to the same extent as for the basic unrepaired structure.Īlthough the cause of an airplane accident has never been attributed to properly applied repairs using the original repair data, repairs may be of concern as time-in-service increases for the following reasons: In general, repairs present a more challenging problem to solve than the original structure because each repair is unique and tailored in design to correct particular damage to the original structure. ![]() The objective of the repair assessment is to assure the continued structural integrity of the repaired and adjacent structure based on damage tolerance principles. The damage-tolerance evaluation of a repair would be used in an assessment program to establish an appropriate inspection program, or a replacement schedule if the necessary inspection program is too demanding or not possible. This damage might occur within the repair itself or in the adjacent structure and might ultimately lead to structural failure. Repairs are a concern on older airplanes because of the possibility that they may develop, cause, or obscure metal fatigue, corrosion, or other damage during service. Aircraft Repair Assessment & Facilitation – Sofema Aviation Services (SAS) considers the process of assessing & managing aircraft Repairs. ![]()
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