A hawker 1000 flight crew was given a descent clearance for traffic, departing atl.

Attributes
ACN	443592
Time
Date	199907
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : atl.airport
State Reference	GA
Altitude	msl single value : 10500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : atl.tracon
Operator	general aviation : corporate
Make Model Name	BAe 125 Series 1000
Operating Under FAR Part	Part 135
Flight Phase	climbout : intermediate altitude
Route In Use	departure : on vectors
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : atl.tracon
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : commercial pilot : atp
Experience	flight time last 90 days : 150 flight time total : 16200 flight time type : 300
ASRS Report	443592
Person 2
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 100 flight time total : 6005 flight time type : 700
ASRS Report	443312
Events
Anomaly	conflict : airborne less severe
Independent Detector	other controllera other flight crewa other flight crewb
Resolutory Action	controller : separated traffic
Miss Distance	horizontal : 15900 vertical : 500
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	Ambiguous

Narrative:

Controller gave us heading 330 degrees and climb to 14000 ft. We had departed pdk approximately 3 mins earlier. While climbing through 10500 ft, controller advised us to stop at 11000 ft because of traffic. (I saw an airliner at 11 O'clock and 2-3 mi out at a slightly higher altitude than us.) then, very quickly, the controller said descend to 10000 ft, which I did immediately.

Original NASA ASRS Text

Title: A HAWKER 1000 FLC WAS GIVEN A DSCNT CLRNC FOR TFC, DEPARTING ATL.

Narrative: CTLR GAVE US HDG 330 DEGS AND CLB TO 14000 FT. WE HAD DEPARTED PDK APPROX 3 MINS EARLIER. WHILE CLBING THROUGH 10500 FT, CTLR ADVISED US TO STOP AT 11000 FT BECAUSE OF TFC. (I SAW AN AIRLINER AT 11 O'CLOCK AND 2-3 MI OUT AT A SLIGHTLY HIGHER ALT THAN US.) THEN, VERY QUICKLY, THE CTLR SAID DSND TO 10000 FT, WHICH I DID IMMEDIATELY.

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.