An mco controller reports of a loss of separation between two aircraft on final. The controller trie...

Attributes
ACN	1244503
Time
Date	201503
Local Time Of Day	1201-1800
Place
Locale Reference	MCO.Airport
State Reference	FL
Aircraft 1
Make Model Name	Large Transport Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 121
Flight Phase	Final Approach Landing
Route In Use	Other Instrument Approach
Flight Plan	IFR
Aircraft 2
Make Model Name	Large Transport
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Route In Use	Other Instrument Approach
Flight Plan	IFR
Person 1
Function	Local
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Time Certified In Pos 1 (yrs) 1.5
Events
Anomaly	ATC Issue All Types Conflict Airborne Conflict Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy

Narrative:

Suspected loss of wake turbulence separation between aircraft X and aircraft Y on final runway 36L. Aircraft X had been cleared to land and aircraft Y was in trail with spacing deteriorating. When the spacing was approaching minimums; final (1g) called the tower on the override line advising if aircraft Y does not have aircraft X in sight to break him out. I then attempted to contact aircraft Y twice but received no response. After the second attempt; the compression was below the minimum separation required for wake turbulence separation. By the time aircraft y checked on; aircraft X was cross the landing threshold and rolling out. Aircraft Y reported he had aircraft X on roll out in sight. I issued him a cautionary and cleared him to land. Aircraft Y landed without further incident.make sure the aircraft is in communication with either tower or final when you are about to lose separation on final; or cancel the approach clearance in enough time so it's not an issue during transfer of communication.

Original NASA ASRS Text

Title: An MCO Controller reports of a loss of separation between two aircraft on final. The Controller tried to break out the second aircraft but it was not on frequency until the loss had happened. The second aircraft landed.

Narrative: Suspected loss of wake turbulence separation between aircraft X and aircraft Y on final runway 36L. Aircraft X had been cleared to land and aircraft Y was in trail with spacing deteriorating. When the spacing was approaching minimums; final (1g) called the tower on the override line advising if aircraft Y does not have aircraft X in sight to break him out. I then attempted to contact aircraft Y twice but received no response. After the second attempt; the compression was below the minimum separation required for wake turbulence separation. By the time aircraft y checked on; aircraft X was cross the landing threshold and rolling out. Aircraft Y reported he had aircraft X on roll out in sight. I issued him a cautionary and cleared him to land. Aircraft Y landed without further incident.Make sure the aircraft is in communication with either tower or final when you are about to lose separation on final; or cancel the approach clearance in enough time so it's not an issue during transfer of communication.

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.

An mco controller reports of a loss of separation between two aircraft on final. The controller tried to break out the second aircraft but it was not on frequency until the loss had happened. The second aircraft landed.