<< >> NASA ASRS Report 759340, October 2007

Lit TRACON controller conducting OJT experienced min separation event assuming the developmental controller completed needed intrafac coordination.

Attributes
ACN	759340
Time
Date	200710
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : lit.airport
State Reference	AK
Altitude	msl single value : 3000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	tower : lit.tower
Operator	general aviation : personal
Make Model Name	Bonanza 36
Operating Under FAR Part	Part 91
Flight Phase	climbout : initial
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tracon : lit.tracon
Operator	other
Make Model Name	Hercules (C-130)
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
Experience	controller radar : 21 flight time total : 160
ASRS Report	759340
Person 2
Affiliation	other
Function	flight crew : single pilot
Events
Anomaly	conflict : airborne less severe other anomaly other
Independent Detector	other controllera
Resolutory Action	none taken : anomaly accepted
Miss Distance	horizontal : 18000 vertical : 1000
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Intra Facility Coordination Failure

Narrative:

I was training on radar east and a BE36 departed. A C130 was working with arrival radar and had just started outbound from the VOR to make a VOR approach. The BE36's destination was northeast which would take it across the final for the VOR approach. I heard the arrival controller and the developmental I was training coordinating and the BE36 was turned east to pass behind the C130. The BE36 got 3 mi northeast of the VOR climbing out of 3000 ft and I noticed the C130 turn inbound at 3000 ft. The arrival controller descended the C130 to 2000 ft and I realized that the C130 wasn't inbound but was still going to turn outbound at 3000 ft which would put it in conflict with the BE36. I assumed the arrival controller and the developmental had coordinated the C130 and BE36 operation but I couldn't hear everything they said. I assumed the C130 would turn inbound and descend but in reality the C130 was going to turn outbound at the VOR one more time before descending. When training; it is hard to hear everything that is being coordinated when it is done without using the land line to coordinate. We don't have a requirement to use the land line for coordination but it would have helped in this situation. I shouldn't have assumed what was coordinated since I didn't hear all of it.

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Original NASA ASRS Text

Title: LIT TRACON CTLR CONDUCTING OJT EXPERIENCED MIN SEPARATION EVENT ASSUMING THE DEVELOPMENTAL CTLR COMPLETED NEEDED INTRAFAC COORD.

Narrative: I WAS TRAINING ON RADAR E AND A BE36 DEPARTED. A C130 WAS WORKING WITH ARR RADAR AND HAD JUST STARTED OUTBOUND FROM THE VOR TO MAKE A VOR APCH. THE BE36'S DEST WAS NE WHICH WOULD TAKE IT ACROSS THE FINAL FOR THE VOR APCH. I HEARD THE ARR CTLR AND THE DEVELOPMENTAL I WAS TRAINING COORDINATING AND THE BE36 WAS TURNED E TO PASS BEHIND THE C130. THE BE36 GOT 3 MI NE OF THE VOR CLBING OUT OF 3000 FT AND I NOTICED THE C130 TURN INBOUND AT 3000 FT. THE ARR CTLR DSNDED THE C130 TO 2000 FT AND I REALIZED THAT THE C130 WASN'T INBOUND BUT WAS STILL GOING TO TURN OUTBOUND AT 3000 FT WHICH WOULD PUT IT IN CONFLICT WITH THE BE36. I ASSUMED THE ARR CTLR AND THE DEVELOPMENTAL HAD COORDINATED THE C130 AND BE36 OP BUT I COULDN'T HEAR EVERYTHING THEY SAID. I ASSUMED THE C130 WOULD TURN INBOUND AND DSND BUT IN REALITY THE C130 WAS GOING TO TURN OUTBOUND AT THE VOR ONE MORE TIME BEFORE DSNDING. WHEN TRAINING; IT IS HARD TO HEAR EVERYTHING THAT IS BEING COORDINATED WHEN IT IS DONE WITHOUT USING THE LAND LINE TO COORDINATE. WE DON'T HAVE A REQUIREMENT TO USE THE LAND LINE FOR COORD BUT IT WOULD HAVE HELPED IN THIS SITUATION. I SHOULDN'T HAVE ASSUMED WHAT WAS COORDINATED SINCE I DIDN'T HEAR ALL OF IT.

Data retrieved from NASA's ASRS site as of January 2009 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.