OJT in progress and controller tried to run visual approach ahead of ILS aircraft. Less than standard separation occurred.

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Attributes
ACN	171491
Time
Date	199102
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : ind
State Reference	IN
Altitude	msl bound lower : 3300 msl bound upper : 3500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : ind tower : elp
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude descent : approach
Route In Use	enroute : on vectors
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	approach : visual enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Experience	controller radar : 5
ASRS Report	171491
Person 2
Affiliation	government : faa
Function	controller : approach
Qualification	controller : developmental
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	Other
Miss Distance	horizontal : 15000 vertical : 200
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

I was training a developmental controller during this situation. Medium large transport X straight-in ILS 32 approach. Mlt Y was attempted to be turned on final in front of medium large transport X. Medium large transport Y was wide on the downwind and slow to turn and descend. As the situation was developing we discussed the action to take if this plan wasn't going to work. I told the developmental to break the medium large transport X out. He stumbled over his words and finally turned medium large transport X to a 270 degree heading. It wasn't working so I broke in and turned medium large transport X to a 180 degree heading and expedited his climb to 4000'. Then I turned medium large transport Y to a 360 degree heading and descended him to 2500'. This was reported to the supervisor who did not see the occurrence. The supervisor then went to the assistant manager of operations (amo) who was in the TRACON observing the operations and saw the occurrence. The smo said there was course divergence between the 2 aircraft. The subject was then dropped.

Original NASA ASRS Text

Title: OJT IN PROGRESS AND CTLR TRIED TO RUN VISUAL APCH AHEAD OF ILS ACFT. LESS THAN STANDARD SEPARATION OCCURRED.

Narrative: I WAS TRNING A DEVELOPMENTAL CTLR DURING THIS SITUATION. MLG X STRAIGHT-IN ILS 32 APCH. MLT Y WAS ATTEMPTED TO BE TURNED ON FINAL IN FRONT OF MLG X. MLG Y WAS WIDE ON THE DOWNWIND AND SLOW TO TURN AND DSND. AS THE SITUATION WAS DEVELOPING WE DISCUSSED THE ACTION TO TAKE IF THIS PLAN WASN'T GOING TO WORK. I TOLD THE DEVELOPMENTAL TO BREAK THE MLG X OUT. HE STUMBLED OVER HIS WORDS AND FINALLY TURNED MLG X TO A 270 DEG HDG. IT WASN'T WORKING SO I BROKE IN AND TURNED MLG X TO A 180 DEG HDG AND EXPEDITED HIS CLB TO 4000'. THEN I TURNED MLG Y TO A 360 DEG HDG AND DSNDED HIM TO 2500'. THIS WAS RPTED TO THE SUPVR WHO DID NOT SEE THE OCCURRENCE. THE SUPVR THEN WENT TO THE ASSISTANT MGR OF OPS (AMO) WHO WAS IN THE TRACON OBSERVING THE OPS AND SAW THE OCCURRENCE. THE SMO SAID THERE WAS COURSE DIVERGENCE BTWN THE 2 ACFT. THE SUBJECT WAS THEN DROPPED.

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.