Less than standard separation between two air carrier. Operational error.

Attributes
ACN	84788
Time
Date	198803
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : ind
State Reference	IN
Altitude	msl bound lower : 33000 msl bound upper : 35000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zid
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : on vectors enroute airway : j89
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent other
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller radar : 29 controller supervisory : 7
ASRS Report	84788
Person 2
Function	controller : radar
Qualification	controller : developmental
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	other other : unspecified atc
Resolutory Action	controller : issued new clearance other
Consequence	faa : investigated
Miss Distance	horizontal : 24000 vertical : 1200
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Trainee working the sector with air carrier X climbing, and air carrier Y descending. The trainee needed to lock air carrier X present heading at point a. When this didn't happen, I still thought we would have vertical separation, but we did not. Seven years ago, with the older radar equipment, ie broadband radar, these two aircraft would have had standard separation. (3 miles separation within 40 miles of radar antenna.) this was a controled situation at all times.

Original NASA ASRS Text

Title: LESS THAN STANDARD SEPARATION BETWEEN TWO ACR. OPERATIONAL ERROR.

Narrative: TRAINEE WORKING THE SECTOR WITH ACR X CLIMBING, AND ACR Y DESCENDING. THE TRAINEE NEEDED TO LOCK ACR X PRESENT HEADING AT POINT A. WHEN THIS DIDN'T HAPPEN, I STILL THOUGHT WE WOULD HAVE VERTICAL SEPARATION, BUT WE DID NOT. SEVEN YEARS AGO, WITH THE OLDER RADAR EQUIPMENT, IE BROADBAND RADAR, THESE TWO ACFT WOULD HAVE HAD STANDARD SEPARATION. (3 MILES SEPARATION WITHIN 40 MILES OF RADAR ANTENNA.) THIS WAS A CTLED SITUATION AT ALL TIMES.

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.