Small transport Y violated clt TCA had near midair collision with air carrier X.

Attributes
ACN	147708
Time
Date	199006
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : clt
State Reference	NC
Altitude	msl bound lower : 8500 msl bound upper : 8700
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : clt
Operator	common carrier : air carrier
Make Model Name	Medium Transport, High Wing, 2 Turboprop Eng
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : direct
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Transport, Low Wing, 2 Turboprop Eng
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	None
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
ASRS Report	147708
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : nmac non adherence : published procedure non adherence : far other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	faa : investigated
Miss Distance	horizontal : 0 vertical : 200
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I am an ATC controller at the clt ATCT. I was working arrival east sector departure east handed off an air carrier X climbing to 9000' direct to ctf VORTAC. 30 seconds later air carrier X reported that an small transport Y had just passed below his aircraft. I advised air carrier X that I saw the aircraft. Small transport Y did have a mode C transponder which indicated 8600' MSL. Air carrier X was passing 8700' MSL. Small transport Y was not in contact with ATC and was well within (approximately 10-15 NM) the clt TCA. Small transport Y was tracked through the TCA and later idented and reported as a TCA violation. I did not issue a traffic advisory to air carrier X due to the fact I did not see the target. Ie, I was too busy. At the time I was very busy working other traffic. Among this other traffic was an inbound light transport with hydraulic problems. I was busy coordinating with the floor supervisor at time of this incident. Also during this incident I did not have a data person helping me. This I believe contributed to this incident.

Original NASA ASRS Text

Title: SMT Y VIOLATED CLT TCA HAD NMAC WITH ACR X.

Narrative: I AM AN ATC CTLR AT THE CLT ATCT. I WAS WORKING ARR E SECTOR DEP E HANDED OFF AN ACR X CLBING TO 9000' DIRECT TO CTF VORTAC. 30 SECS LATER ACR X RPTED THAT AN SMT Y HAD JUST PASSED BELOW HIS ACFT. I ADVISED ACR X THAT I SAW THE ACFT. SMT Y DID HAVE A MODE C XPONDER WHICH INDICATED 8600' MSL. ACR X WAS PASSING 8700' MSL. SMT Y WAS NOT IN CONTACT WITH ATC AND WAS WELL WITHIN (APPROX 10-15 NM) THE CLT TCA. SMT Y WAS TRACKED THROUGH THE TCA AND LATER IDENTED AND RPTED AS A TCA VIOLATION. I DID NOT ISSUE A TFC ADVISORY TO ACR X DUE TO THE FACT I DID NOT SEE THE TARGET. IE, I WAS TOO BUSY. AT THE TIME I WAS VERY BUSY WORKING OTHER TFC. AMONG THIS OTHER TFC WAS AN INBND LTT WITH HYD PROBS. I WAS BUSY COORDINATING WITH THE FLOOR SUPVR AT TIME OF THIS INCIDENT. ALSO DURING THIS INCIDENT I DID NOT HAVE A DATA PERSON HELPING ME. THIS I BELIEVE CONTRIBUTED TO THIS INCIDENT.

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.