Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 1.5
Situational Awareness; Workload; Communication Breakdown; Time Pressure; Human-Machine Interface; Distraction
Conflict Airborne Conflict; Deviation - Speed All Types; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Provided Assistance; Air Traffic Control Issued New Clearance; Flight Crew Executed Go Around / Missed Approach
Human Factors; Procedure; Aircraft
I was vectoring Aircraft X to follow Aircraft Y for an approach to Runway 5. I issued multiple speed restrictions to Aircraft X due to Aircraft Y rapidly decreasing speed on final. The pilot of Aircraft X did not seem to want to take my speed restrictions as it took him 8-10 miles to drop 40 kts.After an approach clearance including a speed restriction till the FAF and yet another shortly following with that and also informing him why I needed the speed restriction I broke him out just outside the FAF while still having over 3 mile separation with Aircraft X at 2600 and Aircraft Y at 1700. After the breakout instructions Aircraft X continued down final for 1 1/2 miles then descended another 2 hundred feet putting him at 2400 with Aircraft Y at just barely a 1000ft below him. Aircraft X had to be prompted again to break out heading 320 and to maintain 3k. There was a potential loss of separation due to pilot not responding to control instructions in a timely manner.When Aircraft X and Aircraft Yare arriving at roughly the same time; one could say they almost try to manipulate airspeeds; altitudes; etc to force the following aircraft delays.
Fort Wayne Approach Controller reported of one aircraft slowing on final; resulting in the second aircraft having to be taken out and sequenced again. Reporter stated it took two calls to the trailing aircraft to get it off final resulting in a possible loss of separation.