Military X had less than standard separation with aircraft Y assigned same altitude. System error.

Attributes
ACN	293824
Time
Date	199501
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : pmd
State Reference	CA
Altitude	msl bound lower : 8000 msl bound upper : 8000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : edw
Operator	other
Make Model Name	Military Trainer
Operating Under FAR Part	Part 91
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	cruise other
Route In Use	enroute : direct
Flight Plan	IFR
Person 1
Affiliation	government : military
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : military
Experience	flight time last 90 days : 60 flight time total : 6000 flight time type : 3300
ASRS Report	293824
Person 2
Affiliation	government : military
Function	flight crew : first officer
Qualification	pilot : military pilot : instrument
Events
Anomaly	conflict : airborne less severe non adherence : published procedure non adherence : required legal separation
Independent Detector	other controllera other flight crewa
Resolutory Action	controller : issued new clearance other
Consequence	Other
Miss Distance	horizontal : 12000 vertical : 800
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Given clearance to descend from 14000-8000 ft -- on heading to bypass pmd and intercept V-386 to fim. Visually idented traffic on closing course. Looked about level with us or slightly below. As it got closer I was just about to ask approach if traffic was showing up on his radar. Before I could ask approach called us and in a very hurried and concerned voice he told us to climb immediately to 9000 ft. We initiated an immediate climb to 9000 ft and observed traffic passing beneath us. Possibly 1/2 mi to 1 mi lateral separation. We were switched on to burbank with no comment

Original NASA ASRS Text

Title: MIL X HAD LTSS WITH ACFT Y ASSIGNED SAME ALT. SYS ERROR.

Narrative: GIVEN CLRNC TO DSND FROM 14000-8000 FT -- ON HDG TO BYPASS PMD AND INTERCEPT V-386 TO FIM. VISUALLY IDENTED TFC ON CLOSING COURSE. LOOKED ABOUT LEVEL WITH US OR SLIGHTLY BELOW. AS IT GOT CLOSER I WAS JUST ABOUT TO ASK APCH IF TFC WAS SHOWING UP ON HIS RADAR. BEFORE I COULD ASK APCH CALLED US AND IN A VERY HURRIED AND CONCERNED VOICE HE TOLD US TO CLB IMMEDIATELY TO 9000 FT. WE INITIATED AN IMMEDIATE CLB TO 9000 FT AND OBSERVED TFC PASSING BENEATH US. POSSIBLY 1/2 MI TO 1 MI LATERAL SEPARATION. WE WERE SWITCHED ON TO BURBANK WITH NO COMMENT

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.