Jax controller described a near midair collision involving a departing air carrier and a VFR aircraf...

Narrative:

I was working east; satellite; sawgy; and west. An air carrier departed off of runway 25 at jax. I radar identified them; climbed them to 15;000 and turned them on initial contact. I had a departure off of crg and an overflight that I changed their routing and made an amendment in the flight data input/output (FIDO). The air carrier called approximately 7;000 ft and said he had traffic in front of them about 200 ft. I did not notice the target until he called and then I noticed a transponder with no mode-C. I told them I was showing a target with no mode-C. They said they were going to report a near miss. I let the supervisor know and they reviewed the tapes and voice recorder and made they necessary phone calls. The pilot asked if we needed to be talking to that aircraft at that altitude. I told them no. Recommendation; work to improve my scan. Ask for an overhead when it picks up. Have data input any changes into the FIDO.

Original NASA ASRS Text

Title: JAX Controller described a NMAC involving a departing Air Carrier and a VFR aircraft transitioning the area with no Mode-C; the reporter indicating the subject target was not observed prior to the event.

Narrative: I was working East; Satellite; SAWGY; and West. An Air Carrier departed off of Runway 25 at JAX. I RADAR identified them; climbed them to 15;000 and turned them on initial contact. I had a departure off of CRG and an overflight that I changed their routing and made an amendment in the Flight Data Input/Output (FIDO). The Air Carrier called approximately 7;000 FT and said he had traffic in front of them about 200 FT. I did not notice the target until he called and then I noticed a transponder with no Mode-C. I told them I was showing a target with no Mode-C. They said they were going to report a near miss. I let the Supervisor know and they reviewed the tapes and voice recorder and made they necessary phone calls. The pilot asked if we needed to be talking to that aircraft at that altitude. I told them no. Recommendation; work to improve my scan. Ask for an overhead when it picks up. Have Data input any changes into the FIDO.

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	908229
Time
Date	201009
Local Time Of Day	1201-1800
Place
Locale Reference	JAX.Airport
State Reference	FL
Aircraft 1
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	Climb
Route In Use	Vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Plan	VFR
Person 1
Function	Approach Departure
Qualification	Air Traffic Control Fully Certified
Events
Anomaly	ATC Issue All Types Conflict NMAC

Jax controller described a near midair collision involving a departing air carrier and a VFR aircraft transitioning the area with no mode-C; the reporter indicating the subject target was not observed prior to the event.