Mco final controller described potential 'wake remnant' separation event when go-around instructions...

Narrative:

Simultaneous ILS approaches were being conducted to mco. As final controller I was assigned the arm position. The arm position is responsible for final control to runway 17L. The lead aircraft; B757; non-heavy was switched to tower at seado per our LOA's. The B757 speed across the ground was greater than 185 kts. B737; the trailing aircraft eight miles behind was reduced to 160 kts and advised following a B757. B737 was switched at seado to the tower. Speed difference 20 kts. B757 on tower slowed to 125 kts across the ground. B737 at this time started to reduce separation. Two miles inside seado the flm advise me to breakout B737. I called B737 but no response; they were on tower frequency . Flm advised tower to breakout B737. Tower procedure is to give runway heading. This put the aircraft in wake remnant. At the time the approach clearance was cancel B737 was 1;200 feet above B757 altitude . From the time B737 was switched to the tower and the decision to breakout was 23 seconds. Now that we know the FAA is using tarp to measure wake remnants; and we have no tools to use; I personally will not leave the decision to tower to breakout aircraft on final. I will take action prior to seado.

Original NASA ASRS Text

Title: MCO Final Controller described potential 'wake remnant' separation event when go-around instructions were issued; noting that in the future they will initiate actions prior to frequency change to the tower.

Narrative: Simultaneous ILS approaches were being conducted to MCO. As final controller I was assigned the ARM position. The ARM position is responsible for final control to Runway 17L. The lead aircraft; B757; non-heavy was switched to tower at SEADO per our LOA's. The B757 speed across the ground was greater than 185 kts. B737; the trailing aircraft eight miles behind was reduced to 160 kts and advised following a B757. B737 was switched at SEADO to the tower. Speed difference 20 kts. B757 on tower slowed to 125 kts across the ground. B737 at this time started to reduce separation. Two miles inside Seado the FLM advise me to breakout B737. I called B737 but no response; they were on Tower frequency . FLM advised Tower to breakout B737. Tower procedure is to give runway heading. This put the aircraft in wake remnant. At the time the approach clearance was cancel B737 was 1;200 feet above B757 altitude . From the time B737 was switched to the tower and the decision to breakout was 23 seconds. Now that we know the FAA is using TARP to measure wake remnants; and we have no tools to use; I personally will not leave the decision to tower to breakout aircraft on final. I will take action prior to SEADO.

Data retrieved from NASA's ASRS site as of April 2012 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.

Attributes
ACN	878485
Time
Date	201002
Local Time Of Day	0601-1200
Place
Locale Reference	MCO.TRACON
State Reference	FL
Person 1
Function	Approach
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Military 4 Air Traffic Control Non Radar 2 Air Traffic Control Radar 17
Events
Anomaly	ATC Issue All Types

Mco final controller described potential 'wake remnant' separation event when go-around instructions were issued; noting that in the future they will initiate actions prior to frequency change to the tower.