Narrative:

The air carrier BA46 aircraft was descending out of 4700 ft to 4000 ft for a visual approach to runway 17. Approximately 9 NM west of the airport, the BA46 reported a TCASII alert. I turned my attention to him and saw a VFR target indicating 4100 ft MSL covered by data tags. I reported the traffic to the BA46 who then reported a TCASII resolution to climb. He then climbed to approximately 4700 ft MSL and reported the aircraft to be a light twin engine. He then reported that he probably would have collided with the twin without the climb. The BA46 continued for the visual approach and landed. Further investigation showed the twin was a PA44 trainer practicing maneuvers, not radar idented and not talking to ATC. I was working with 12-15 aircraft arriving and departing from myr, cre, hyw, cpc, and gge airports. Several aircraft were also requesting flight following. Because of the concentration of traffic around the airport I was unable to see the VFR target until advised of the TCASII alert. Although class C airspace was requested more than 3 yrs ago and has been approved, it has still not been implemented. Had the class C been implemented, the PA44 would have been radar idented or would have practiced in a less congested area, thus averting this incident. I highly recommend that training aircraft remain in areas well removed from air traffic area's or at least notify ATC of their presence.

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Original NASA ASRS Text

Title: CTLR RPT REGARDING CLOSE PROX OF ACR AND LIGHT TWIN MANEUVERING CLOSE TO BUSY ARPT AREA. TCASII ALERT ACTIVATES ON ACR. CLOSE PROX OF TFC. TRAINING CLOSE TO ACTIVE ARPT.

Narrative: THE ACR BA46 ACFT WAS DSNDING OUT OF 4700 FT TO 4000 FT FOR A VISUAL APCH TO RWY 17. APPROX 9 NM W OF THE ARPT, THE BA46 RPTED A TCASII ALERT. I TURNED MY ATTN TO HIM AND SAW A VFR TARGET INDICATING 4100 FT MSL COVERED BY DATA TAGS. I RPTED THE TFC TO THE BA46 WHO THEN RPTED A TCASII RESOLUTION TO CLB. HE THEN CLBED TO APPROX 4700 FT MSL AND RPTED THE ACFT TO BE A LIGHT TWIN ENG. HE THEN RPTED THAT HE PROBABLY WOULD HAVE COLLIDED WITH THE TWIN WITHOUT THE CLB. THE BA46 CONTINUED FOR THE VISUAL APCH AND LANDED. FURTHER INVESTIGATION SHOWED THE TWIN WAS A PA44 TRAINER PRACTICING MANEUVERS, NOT RADAR IDENTED AND NOT TALKING TO ATC. I WAS WORKING WITH 12-15 ACFT ARRIVING AND DEPARTING FROM MYR, CRE, HYW, CPC, AND GGE ARPTS. SEVERAL ACFT WERE ALSO REQUESTING FLT FOLLOWING. BECAUSE OF THE CONCENTRATION OF TFC AROUND THE ARPT I WAS UNABLE TO SEE THE VFR TARGET UNTIL ADVISED OF THE TCASII ALERT. ALTHOUGH CLASS C AIRSPACE WAS REQUESTED MORE THAN 3 YRS AGO AND HAS BEEN APPROVED, IT HAS STILL NOT BEEN IMPLEMENTED. HAD THE CLASS C BEEN IMPLEMENTED, THE PA44 WOULD HAVE BEEN RADAR IDENTED OR WOULD HAVE PRACTICED IN A LESS CONGESTED AREA, THUS AVERTING THIS INCIDENT. I HIGHLY RECOMMEND THAT TRAINING ACFT REMAIN IN AREAS WELL REMOVED FROM ATA'S OR AT LEAST NOTIFY ATC OF THEIR PRESENCE.

Data retrieved from NASA's ASRS site as of July 2007 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.