ZTL controller providing OJT experienced operational error at FL320 when student separation vectors ...

Attributes
ACN	692708
Time
Date	200603
Local Time Of Day	0601 To 1200
Place
Locale Reference	navaid : vxv.vortac
State Reference	TN
Altitude	msl single value : 32000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : ztl.artcc
Operator	common carrier : air carrier
Make Model Name	Regional Jet 700 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	descent : intermediate altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : ztl.artcc
Operator	common carrier : air carrier
Make Model Name	B717
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller limited radar : 4 controller non radar : 5 controller radar : 3 controller time certified in position1 : 3 controller time certified in position2 : 2
ASRS Report	692708
Person 2
Affiliation	government : faa
Function	controller : radar
Qualification	controller : developmental
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	atc equipment : conflict alert other controllera
Resolutory Action	controller : issued alert controller : issued new clearance
Consequence	faa : investigated
Miss Distance	horizontal : 29400 vertical : 300
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

I was providing ATC ojti at ZTL sector 39. Developmental controller descended CRJ7 to FL330 landing clt approximately 10 NM from vxv. B712 was in cruise northbound approximately 5 NM south of vxv. Developmental recognized that descent clearance put CRJ7 in conflict with B712; which was level at FL320. I instructed developmental to vector both aircraft. Due to closure rae; turns were insufficient to maintain lateral separation. During the event; conflict alert was activated. At no time was there a serious risk to either aircraft. Error occurred at 4.9 NM and 300 ft as crj descended on a vector behind B717.

Original NASA ASRS Text

Title: ZTL CTLR PROVIDING OJT EXPERIENCED OPERROR AT FL320 WHEN STUDENT SEPARATION VECTORS WERE NOT SUFFICIENT.

Narrative: I WAS PROVIDING ATC OJTI AT ZTL SECTOR 39. DEVELOPMENTAL CTLR DSNDED CRJ7 TO FL330 LNDG CLT APPROX 10 NM FROM VXV. B712 WAS IN CRUISE NBOUND APPROX 5 NM S OF VXV. DEVELOPMENTAL RECOGNIZED THAT DSCNT CLRNC PUT CRJ7 IN CONFLICT WITH B712; WHICH WAS LEVEL AT FL320. I INSTRUCTED DEVELOPMENTAL TO VECTOR BOTH ACFT. DUE TO CLOSURE RAE; TURNS WERE INSUFFICIENT TO MAINTAIN LATERAL SEPARATION. DURING THE EVENT; CONFLICT ALERT WAS ACTIVATED. AT NO TIME WAS THERE A SERIOUS RISK TO EITHER ACFT. ERROR OCCURRED AT 4.9 NM AND 300 FT AS CRJ DSNDED ON A VECTOR BEHIND B717.

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.

ZTL controller providing OJT experienced operational error at FL320 when student separation vectors were not sufficient.