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Digital ACMS Recorder (DAR)
From SKYbrary Wiki
A Digital ACMS Recorder (DAR) records onboard flight parameters, contributing to preventative maintenance and analysis of system incident causes. See the separate article on Aircraft Condition Monitoring System (ACMS) for more detail.
Flight Data Recording System
The DAR sits alongside the Quick Access Recorder (QAR)] in many aircraft. Its functionality may be integrated within a Flight Data Acquisition And Management System (FDAMS).