Customer low utilization maintenance scheme is based on the customer demandand operation situation, when the actual customer aircraft utilization rate is lower thanthe scope of maintenance outline, based on the normal utilization of maintenancescheme for low utilization of operating conditions of fixed inspection requirements, tomeet the bureau AC-121-53 "civil aircraft maintenance scheme" the airworthinessrequirements of low utilization maintenance scheme.

Customer low utilization maintenance scheme includes the aircraft under thecondition of low utilization operation, the aircraft required to performinspection tasksand low utilization interval requirements, is to ensure the safety of the aircraft sustainable airworthiness plan maintenance documents, the maintenance plan, in order to meet the requirements of the board airworthiness regulations.