Reporter indicates traffic may have passed behind them in descent with less than standard separation...

Attributes
ACN	126744
Time
Date	198910
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : lbb
State Reference	TX
Altitude	msl bound lower : 10000 msl bound upper : 10500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : lbb
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Route In Use	departure other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial pilot : atp
Experience	flight time last 90 days : 250 flight time total : 7000 flight time type : 2000
ASRS Report	126744
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : commercial pilot : instrument
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	other controllera other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Miss Distance	horizontal : 20000
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other

Narrative:

Clearance was issued prior to pushback to maintain 17000' MSL along with our routing V102 gth direct sps heavn 3 arrival to dallas love field. We took off on runway 8 at lubbock and cleared on course. Approaching 10000' MSL, traffic was called by departure control at 9 O'clock (5 mi), sebnd, 10500' descending to 10000'. We had the MTR in sight and he passed about 3-4 mi behind us. We took no evasive action. The controller asked what altitude we had been cleared to. We told him 17000'. He handed us off to ft worth ARTCC and nothing else was said.

Original NASA ASRS Text

Title: REPORTER INDICATES TRAFFIC MAY HAVE PASSED BEHIND THEM IN DESCENT WITH LESS THAN STANDARD SEPARATION.

Narrative: CLRNC WAS ISSUED PRIOR TO PUSHBACK TO MAINTAIN 17000' MSL ALONG WITH OUR ROUTING V102 GTH DIRECT SPS HEAVN 3 ARR TO DALLAS LOVE FIELD. WE TOOK OFF ON RWY 8 AT LUBBOCK AND CLRED ON COURSE. APCHING 10000' MSL, TFC WAS CALLED BY DEP CTL AT 9 O'CLOCK (5 MI), SEBND, 10500' DSNDING TO 10000'. WE HAD THE MTR IN SIGHT AND HE PASSED ABOUT 3-4 MI BEHIND US. WE TOOK NO EVASIVE ACTION. THE CTLR ASKED WHAT ALT WE HAD BEEN CLRED TO. WE TOLD HIM 17000'. HE HANDED US OFF TO FT WORTH ARTCC AND NOTHING ELSE WAS SAID.

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.