CMR
Mcar reg 28 – all aircraft register in Malaysian respect of certificate if airworthiness either transport or aerial work category cannot fly unless it be maintenance by approve maintenance manual and certificate maintenance review (cmr) are issued and valid.

Cmr is a review of current maintenance status, to say that at the date of issued the aircraft have been maintence as per approved maintenance schedule. All mandatory modification and inspection as been complete. All the technical log defect as been rectified or differ and All crs, crs-smi are issued and valid. A person who can sign the cmr is licenses aircraft engineer with two categorize except x (compass) or person have approvals from DCA or Person authorized from approved organization. A validation of cmr for aircraft with <2730kg in transport and aerial work categorized is 4 mounth and 1 year for other aircraft.