A VFR aircraft made an evasive turn around same altitude traffic.

Attributes
ACN	116063
Time
Date	198907
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : scy
State Reference	TX
Altitude	msl bound lower : 2000 msl bound upper : 2000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zfw
Operator	general aviation : personal
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	cruise other
Flight Plan	VFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
ASRS Report	116063
Person 2
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private
Events
Anomaly	conflict : airborne less severe non adherence : far other anomaly other
Independent Detector	other controllera other flight crewa
Resolutory Action	none taken : insufficient time
Consequence	Other
Miss Distance	horizontal : 3000 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other
Situations
ATC Facility	other physical facility

Narrative:

Aircraft called on center frequency VFR at 2500' requesting advisories. The aircraft was below radar coverage until 25 mi south of scurry intersection. Until that time I advised the aircraft on location of scattered areas of precipitation located between 10 mi and 40 mi south of scurry. Good 2-WAY radio communications were maintained. After I advised radar contact, pilot advised that he was almost around the WX and requested a vector to destination airport, grand prairie, tx. I advised a heading of 300. Aircraft turned to 300 heading about 10 mi south of scurry, and mode C indicated descent from 2500 to 2000. As aircraft was about to enter dallas ft worth approach control, I attempted to call the aircraft to terminate service and authorize frequency change. I attempted about 3 xmissions with no response. After coordinating an IFR departure with tyr approach control, I looked at my display and observed the VFR aircraft, about 3-5 mi inside dfw approach airspace, merging with a VFR target northeast bound at same altitude. Target made gross evasive maneuver to southwest and then turned northwest again, as I could only watch, unable to make radio contact. I subsequently had an aircraft check on my frequency, and successfully relayed to the aircraft to contact approach control. Due to high volume of IFR and VFR aircraft in vicinity of scurry VOR, better radio coverage could have prevented this occurrence, and possible future occurrences.

Original NASA ASRS Text

Title: A VFR ACFT MADE AN EVASIVE TURN AROUND SAME ALT TRAFFIC.

Narrative: ACFT CALLED ON CENTER FREQ VFR AT 2500' REQUESTING ADVISORIES. THE ACFT WAS BELOW RADAR COVERAGE UNTIL 25 MI S OF SCURRY INTXN. UNTIL THAT TIME I ADVISED THE ACFT ON LOCATION OF SCATTERED AREAS OF PRECIPITATION LOCATED BETWEEN 10 MI AND 40 MI S OF SCURRY. GOOD 2-WAY RADIO COMS WERE MAINTAINED. AFTER I ADVISED RADAR CONTACT, PLT ADVISED THAT HE WAS ALMOST AROUND THE WX AND REQUESTED A VECTOR TO DEST ARPT, GRAND PRAIRIE, TX. I ADVISED A HDG OF 300. ACFT TURNED TO 300 HDG ABOUT 10 MI S OF SCURRY, AND MODE C INDICATED DSCNT FROM 2500 TO 2000. AS ACFT WAS ABOUT TO ENTER DALLAS FT WORTH APCH CTL, I ATTEMPTED TO CALL THE ACFT TO TERMINATE SERVICE AND AUTHORIZE FREQ CHANGE. I ATTEMPTED ABOUT 3 XMISSIONS WITH NO RESPONSE. AFTER COORDINATING AN IFR DEP WITH TYR APCH CTL, I LOOKED AT MY DISPLAY AND OBSERVED THE VFR ACFT, ABOUT 3-5 MI INSIDE DFW APCH AIRSPACE, MERGING WITH A VFR TARGET NE BOUND AT SAME ALT. TARGET MADE GROSS EVASIVE MANEUVER TO SW AND THEN TURNED NW AGAIN, AS I COULD ONLY WATCH, UNABLE TO MAKE RADIO CONTACT. I SUBSEQUENTLY HAD AN ACFT CHECK ON MY FREQ, AND SUCCESSFULLY RELAYED TO THE ACFT TO CONTACT APCH CTL. DUE TO HIGH VOLUME OF IFR AND VFR ACFT IN VICINITY OF SCURRY VOR, BETTER RADIO COVERAGE COULD HAVE PREVENTED THIS OCCURRENCE, AND POSSIBLE FUTURE OCCURRENCES.

Data retrieved from NASA's ASRS site as of August 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.