<< >> NASA ASRS Report 572759, January 2003

ZOB ARTCC radar controller lost lateral separation before vertical separation could be applied between a CRJ2 climbing and a B737 descending.

Attributes
ACN	572759
Time
Date	200301
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	navaid : vwv.vor
State Reference	OH
Altitude	msl bound lower : 24000 msl bound upper : 25000
Environment
Flight Conditions	IMC
Weather Elements	Turbulence
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zob.artcc
Operator	common carrier : air carrier
Make Model Name	Regional Jet CL65, Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zob.artcc
Operator	common carrier : air carrier
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : vacating altitude
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller limited radar : 13 controller military : 0 controller non radar : 15 controller radar : 12 controller time certified in position1 : 5
ASRS Report	572759
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	conflict : airborne critical non adherence : published procedure non adherence : required legal separation
Independent Detector	atc equipment : conflict alert atc equipment other atc equipment : radar/mode c other controllera other flight crewa other flight crewb
Resolutory Action	flight crew : took evasive action
Miss Distance	horizontal : 27600 vertical : 700
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

CRJ2 departed cle for ord. B735 was inbound to cle. When CRJ2 transitioned from a low altitude sector to a high altitude sector, the aircraft was cleared to an altitude that the B735 was descending through without enough lateral separation.

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Original NASA ASRS Text

Title: ZOB ARTCC RADAR CTLR LOST LATERAL SEPARATION BEFORE VERT SEPARATION COULD BE APPLIED BTWN A CRJ2 CLBING AND A B737 DSNDING.

Narrative: CRJ2 DEPARTED CLE FOR ORD. B735 WAS INBOUND TO CLE. WHEN CRJ2 TRANSITIONED FROM A LOW ALT SECTOR TO A HIGH ALT SECTOR, THE ACFT WAS CLRED TO AN ALT THAT THE B735 WAS DSNDING THROUGH WITHOUT ENOUGH LATERAL SEPARATION.

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.