Air carrier X had less than standard separation from small transport Y. System error.

Attributes
ACN	145105
Time
Date	199005
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : sli
State Reference	CA
Altitude	msl bound lower : 13500 msl bound upper : 14000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : ont
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
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	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : atp pilot : instrument
Experience	flight time last 90 days : 100 flight time total : 14000 flight time type : 6000
ASRS Report	145105
Person 2
Affiliation	company : air carrier
Function	flight crew : second officer
Qualification	pilot : instrument pilot : flight engineer pilot : commercial pilot : atp
Experience	flight time last 90 days : 100 flight time total : 4950 flight time type : 1000
ASRS Report	145466
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation non adherence : published procedure
Independent Detector	other controllera other flight crewa
Resolutory Action	other
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 3000 vertical : 500
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Climbing through 13500' we saw an aircraft at less than 1/2 mi beginning a northbound turn. Departure control was talking to small transport Y we later determined was our observed traffic. Departure then told us we had small transport Y traffic at 14000' turning northbound. Our cleared altitude was 14000'. He was less than 1/2 mi and really looked big. ATC did not pointout traffic prior to conflict.

Original NASA ASRS Text

Title: ACR X HAD LESS THAN STANDARD SEPARATION FROM SMT Y. SYSTEM ERROR.

Narrative: CLBING THROUGH 13500' WE SAW AN ACFT AT LESS THAN 1/2 MI BEGINNING A NBND TURN. DEP CTL WAS TALKING TO SMT Y WE LATER DETERMINED WAS OUR OBSERVED TFC. DEP THEN TOLD US WE HAD SMT Y TFC AT 14000' TURNING NBND. OUR CLRED ALT WAS 14000'. HE WAS LESS THAN 1/2 MI AND REALLY LOOKED BIG. ATC DID NOT POINTOUT TFC PRIOR TO CONFLICT.

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.