Fort wayne approach controller reported of one aircraft slowing on final; resulting in the second ai...

Attributes
ACN	1419322
Time
Date	201701
Local Time Of Day	0601-1200
Place
Locale Reference	FWA.Airport
State Reference	IN
Aircraft 1
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Route In Use	Other Instrument Approach
Flight Plan	IFR
Aircraft 2
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Route In Use	Vectors
Flight Plan	IFR
Person 1
Function	Approach
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Time Certified In Pos 1 (yrs) 1.5
Events
Anomaly	Conflict Airborne Conflict Deviation - Procedural Published Material / Policy Deviation - Procedural Clearance Deviation - Speed All Types Deviation - Track / Heading All Types

Narrative:

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.

Original NASA ASRS Text

Title: 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.

Narrative: 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.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

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.