When aircraft are out of service and stored for any reason, it becomes necessary to apply a preventive maintenance regime. Specific requirements will vary for such reasons as length of time that the aircraft has not flown or the environment in which it is stored… Aircraft continuing airworthiness management must be maintained throughout the lease transition and storage period.
forecasting and planning of the Approved Maintenance Program requirements
subsequent updating of the aircraft records.
production and supply of required work packs
monitoring Airworthiness Directives (AD's) and assisting with the planning of AD compliance actions.