A90 TRACON controller allowed spacing between two aircraft on final approach to decrease to less tha...

Attributes
ACN	1318876
Time
Date	201512
Local Time Of Day	0001-0600
Place
Locale Reference	A90.TRACON
State Reference	NH
Environment
Light	Night
Aircraft 1
Make Model Name	A320
Operating Under FAR Part	Part 121
Flight Phase	Descent
Route In Use	Visual Approach
Flight Plan	IFR
Aircraft 2
Make Model Name	Cessna 402/402C/B379 Businessliner/Utiliner
Operating Under FAR Part	Part 121
Flight Phase	Descent
Route In Use	Visual Approach
Flight Plan	VFR
Person 1
Function	Approach
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Time Certified In Pos 1 (yrs) 2.0
Events
Anomaly	ATC Issue All Types Conflict Airborne Conflict Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Deviation - Speed All Types

Narrative:

Aircraft Y was in front of pack of planes for an ILS approach; aircraft X was on downwind to base; aircraft Z was straight in approach. Similar sounding call signs created a bit of confusion at the beginning. I had appropriate separation at the final approach fix with aircraft Y and aircraft X. I did however assign 190 knots to aircraft X and forgot to relinquish the speed control; prior to transferring the aircraft to the tower. Aircraft Y slowed to a slower than normal speed inside the final approach fix. The closest point was 1.81 miles; tower was providing visual separation. The tower sent the aircraft X around after adsb-X alert. For an unknown reason the crew of aircraft X advised the tower of a near mid-air situation. I am not aware of any aircraft in a close proximity to aircraft X.

Original NASA ASRS Text

Title: A90 TRACON Controller allowed spacing between two aircraft on final approach to decrease to less than required minimums.

Narrative: Aircraft Y was in front of pack of planes for an ILS approach; Aircraft X was on downwind to base; Aircraft Z was straight in approach. Similar sounding call signs created a bit of confusion at the beginning. I had appropriate separation at the final approach fix with Aircraft Y and Aircraft X. I did however assign 190 knots to Aircraft X and forgot to relinquish the speed control; prior to transferring the aircraft to the tower. Aircraft Y slowed to a slower than normal speed inside the Final Approach Fix. The closest point was 1.81 miles; Tower was providing visual separation. The tower sent the Aircraft X around after ADSB-X alert. For an unknown reason the crew of Aircraft X advised the tower of a near mid-air situation. I am not aware of any aircraft in a close proximity to Aircraft X.

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.

A90 TRACON controller allowed spacing between two aircraft on final approach to decrease to less than required minimums.