Medium Transport
Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 1.0
Situational Awareness; Communication Breakdown
ATC Issue All Types; Conflict Airborne Conflict; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance
Air Traffic Control Separated Traffic; Air Traffic Control Issued New Clearance
Human Factors; Aircraft
Aircraft Y was inbound to a reporting point 3 miles east of the field for the midfield right downwind from the southeast at 4;000 feet. Aircraft X was joining the midfield right downwind at 2;000 feet. Aircraft Y was issued a control instruction to maintain at or above 2;500 feet. Aircraft Y refused to answer repeated instructions to stop his descent. Another aircraft was broken off final so I could turn aircraft X to final to avoid an opposite direction midair when aircraft Y would not answer. Traffic and safety alerts were issued. Aircraft X turned in with less than a mile and 0 vertical feet from aircraft Y. Aircraft Y finally answered and reported over a reporting point 4 miles from his actual position oblivious to anything going on. I cleared aircraft Y to land and instructed him to call the tower. The supervisor who I reported this all; who witnessed it all unfold as the operational Supervisor did not file an MOR (Mandatory Occurrence Report) and when he talked to the pilot he told the pilot to be more careful next time.Pilots who disregard control instructions should be reported to flight standards and paperwork needs to be filed. A Supervisor should not just brush this under the rug.
FRG Local Controller reported an airborne conflict occurred when an aircraft that was on a converging course with other traffic in their pattern did not respond to their instructions.