The Registered Operator's maintenance control practices did not ensure compliance with all Airworthiness Directives.
The operator has revised their process for ensuring that all airworthiness directives (AD) are completed on their aircraft by creating a list of required ADs so that they can in future minitor their compliance.
The aircraft operator has created an ongoing list of the required airworthiness directives affecting each aircraft to facilitate compliance monitoring.
The ATSB is satisfied that the safety action taken by the aircraft operator adequately addresses the safety issue.