Narrative:

C130 in left traffic runway 32, C550 runway 32 visual approach. Traffic issued to C130 making left base, then C550 checked on the frequency and traffic issued to C550, 'C130 ahead and to your left in front, C130 making touch-and-go or low approach.' approximately 30-45 seconds later, C550 advised he was making a 360 degree turn on final because of the aircraft ahead of him. I advised the C550 negative, that traffic following was a heavy KR35, so I could not approve a 360 degree [circle]. I then cleared the C550 to land runway 32. The C550 continued and landed without incident. Wake turbulence separation was not maintained. 2 factors were: 1) the C550 coming to my frequency late and not getting the C130 in sight, also 2) the inexperience of the flight crew making an approach with pilot training occurring. A way to resolve this would have been to allow the C550 crew some other request even though I could not approve a 360 degree circle on final. Also, getting the C550 on my frequency in a more timely manner could have allowed the C550 flight crew to acquire the traffic and maintain visual separation, as is done routinely at this airport. Callback conversation with reporter revealed the following information: the reporter said the following aircraft was a C550 and not a lear jet as indicated in the report. He said the report was submitted because the C550 pilot was refused a 360 circle because of his spacing behind the C130 making a low approach. No turbulence was encountered and the C550 landed without incident. However, separation was not maintained.

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Original NASA ASRS Text

Title: A GPT LCL CTLR CLRS A C550 TO LAND BEHIND A C130 MAKING A LOW APCH WITH LESS THAN THE REQUIRED SEPARATION FOR WAKE TURB.

Narrative: C130 IN L TFC RWY 32, C550 RWY 32 VISUAL APCH. TFC ISSUED TO C130 MAKING L BASE, THEN C550 CHKED ON THE FREQ AND TFC ISSUED TO C550, 'C130 AHEAD AND TO YOUR L IN FRONT, C130 MAKING TOUCH-AND-GO OR LOW APCH.' APPROX 30-45 SECONDS LATER, C550 ADVISED HE WAS MAKING A 360 DEG TURN ON FINAL BECAUSE OF THE ACFT AHEAD OF HIM. I ADVISED THE C550 NEGATIVE, THAT TFC FOLLOWING WAS A HVY KR35, SO I COULD NOT APPROVE A 360 DEG [CIRCLE]. I THEN CLRED THE C550 TO LAND RWY 32. THE C550 CONTINUED AND LANDED WITHOUT INCIDENT. WAKE TURB SEPARATION WAS NOT MAINTAINED. 2 FACTORS WERE: 1) THE C550 COMING TO MY FREQ LATE AND NOT GETTING THE C130 IN SIGHT, ALSO 2) THE INEXPERIENCE OF THE FLT CREW MAKING AN APCH WITH PLT TRAINING OCCURRING. A WAY TO RESOLVE THIS WOULD HAVE BEEN TO ALLOW THE C550 CREW SOME OTHER REQUEST EVEN THOUGH I COULD NOT APPROVE A 360 DEG CIRCLE ON FINAL. ALSO, GETTING THE C550 ON MY FREQ IN A MORE TIMELY MANNER COULD HAVE ALLOWED THE C550 FLT CREW TO ACQUIRE THE TFC AND MAINTAIN VISUAL SEPARATION, AS IS DONE ROUTINELY AT THIS ARPT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR SAID THE FOLLOWING ACFT WAS A C550 AND NOT A LEAR JET AS INDICATED IN THE RPT. HE SAID THE RPT WAS SUBMITTED BECAUSE THE C550 PLT WAS REFUSED A 360 CIRCLE BECAUSE OF HIS SPACING BEHIND THE C130 MAKING A LOW APCH. NO TURB WAS ENCOUNTERED AND THE C550 LANDED WITHOUT INCIDENT. HOWEVER, SEPARATION WAS NOT MAINTAINED.

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.