ARTCC radar controller descended a military T44 through the altitude of another MTR with less than s...

Attributes
ACN	343300
Time
Date	199608
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : ela
State Reference	TX
Altitude	msl bound lower : 10000 msl bound upper : 10500
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zhu
Operator	other
Make Model Name	Military Trainer
Operating Under FAR Part	other : other
Flight Phase	descent other
Flight Plan	IFR
Aircraft 2
Operator	other
Make Model Name	Military Trainer
Operating Under FAR Part	other : other
Flight Phase	cruise other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar pilot : private
Experience	controller non radar : 12 controller radar : 10 flight time total : 230
ASRS Report	343300
Person 2
Affiliation	government : military
Function	flight crew : captain oversight : pic
Qualification	pilot : military
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	atc equipment other atc equipment : unspecified other controllera
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Miss Distance	horizontal : 21000 vertical : 500
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

The first MTR X aircraft was idu-psx at 11000 ft. The second MTR Y aircraft was east of idu radar vector 190 degrees for ngp at 10000 ft. When the first MTR X checked on and wanted a practice approach at 5r5, there was 6 mi separation between both aircraft, but I did not notice there was a 30 KT overtake. When the first MTR X started the descent, the second MTR Y caught the first MTR X on the back side. Closest proximity the aircraft got were 3.5 mi 500 ft.

Original NASA ASRS Text

Title: ARTCC RADAR CTLR DSNDED A MIL T44 THROUGH THE ALT OF ANOTHER MTR WITH LTSS.

Narrative: THE FIRST MTR X ACFT WAS IDU-PSX AT 11000 FT. THE SECOND MTR Y ACFT WAS E OF IDU RADAR VECTOR 190 DEGS FOR NGP AT 10000 FT. WHEN THE FIRST MTR X CHKED ON AND WANTED A PRACTICE APCH AT 5R5, THERE WAS 6 MI SEPARATION BTWN BOTH ACFT, BUT I DID NOT NOTICE THERE WAS A 30 KT OVERTAKE. WHEN THE FIRST MTR X STARTED THE DSCNT, THE SECOND MTR Y CAUGHT THE FIRST MTR X ON THE BACK SIDE. CLOSEST PROX THE ACFT GOT WERE 3.5 MI 500 FT.

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.

ARTCC radar controller descended a military T44 through the altitude of another MTR with less than standard separation.