Operational error creates a potential conflict between 2 ltts.

Attributes
ACN	237560
Time
Date	199303
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : mcn
State Reference	GA
Altitude	msl bound lower : 8000 msl bound upper : 9000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : mcn
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Navigation In Use	Other Other
Flight Phase	cruise other
Route In Use	arrival other arrival star : star enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude cruise other
Route In Use	arrival other arrival star : star enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 240 flight time total : 5000 flight time type : 3000
ASRS Report	237560
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation other anomaly other
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance
Consequence	Other
Miss Distance	horizontal : 7500 vertical : 800
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

We were at 8000 ft. Our flight was air carrier X (aby-atl). Another company flight Y was also on frequency (mcn approach 119.6) at 8000. Flight Y was given heading 270 degrees to join sinca 1 arrival. Our flight X was given heading 330 degrees to 'expect to join sinca 1 arrival.' controller called traffic for us '12 O'clock, 4 mi' and instructed company flight Y to climb immediately to 9000 ft. We saw the other aircraft at 12 O'clock climbing rapidly and our flight did not take evasive action. Both aircraft were at approximately 200 KIAS. Supplemental information from acn 237570: both aircraft were converging at cruise speed, so closure rates caused us to get pretty close before we passed. I picked up the other aircraft as we climbed, he saw us 'pop out of the haze' above him.

Original NASA ASRS Text

Title: OPERROR CREATES A POTENTIAL CONFLICT BTWN 2 LTTS.

Narrative: WE WERE AT 8000 FT. OUR FLT WAS ACR X (ABY-ATL). ANOTHER COMPANY FLT Y WAS ALSO ON FREQ (MCN APCH 119.6) AT 8000. FLT Y WAS GIVEN HDG 270 DEGS TO JOIN SINCA 1 ARR. OUR FLT X WAS GIVEN HDG 330 DEGS TO 'EXPECT TO JOIN SINCA 1 ARR.' CTLR CALLED TFC FOR US '12 O'CLOCK, 4 MI' AND INSTRUCTED COMPANY FLT Y TO CLB IMMEDIATELY TO 9000 FT. WE SAW THE OTHER ACFT AT 12 O'CLOCK CLBING RAPIDLY AND OUR FLT DID NOT TAKE EVASIVE ACTION. BOTH ACFT WERE AT APPROX 200 KIAS. SUPPLEMENTAL INFO FROM ACN 237570: BOTH ACFT WERE CONVERGING AT CRUISE SPD, SO CLOSURE RATES CAUSED US TO GET PRETTY CLOSE BEFORE WE PASSED. I PICKED UP THE OTHER ACFT AS WE CLBED, HE SAW US 'POP OUT OF THE HAZE' ABOVE HIM.

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.