<< >> NASA ASRS Report 340082, June 1996

ARTCC radar controller descended an air carrier through an occupied altitude in another controller's airspace. Heading changes were not complied with due to WX.

Attributes
ACN	340082
Time
Date	199606
Day	Sun
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : mgw
State Reference	WV
Altitude	msl bound lower : 19000 msl bound upper : 19000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zob
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	cruise other
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
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller radar : 19
ASRS Report	340082
Person 2
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Events
Anomaly	conflict : airborne less severe non adherence : published procedure non adherence : required legal separation
Independent Detector	atc equipment other atc equipment : unspecified other controllera
Resolutory Action	controller : issued new clearance other
Consequence	Other
Miss Distance	horizontal : 24000 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

I was controling air carrier Y landing pit. The aircraft was east of mgw at FL200 when I cleared him to descend at pilot's discretion to 14000 ft. The aircraft was deving for WX and cleared direct ihd when able. This aircraft was still within the confines of the morgantown sector and I did not have control to descend. Aircraft were deving throughout the sector due to WX. I became distraction performing other duties and was alerted to traffic at FL190 (air carrier X) by the mgw sector radar controller. This was before conflict alert activated. I issued air carrier Y a turn to heading 070 degrees and expedite descent through FL180 (the aircraft was through FL195 at the time). Subsequently air carrier Y advised he could not turn right beyond 360 degrees due to WX and separation was lost.

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Original NASA ASRS Text

Title: ARTCC RADAR CTLR DSNDED AN ACR THROUGH AN OCCUPIED ALT IN ANOTHER CTLR'S AIRSPACE. HDG CHANGES WERE NOT COMPLIED WITH DUE TO WX.

Narrative: I WAS CTLING ACR Y LNDG PIT. THE ACFT WAS E OF MGW AT FL200 WHEN I CLRED HIM TO DSND AT PLT'S DISCRETION TO 14000 FT. THE ACFT WAS DEVING FOR WX AND CLRED DIRECT IHD WHEN ABLE. THIS ACFT WAS STILL WITHIN THE CONFINES OF THE MORGANTOWN SECTOR AND I DID NOT HAVE CTL TO DSND. ACFT WERE DEVING THROUGHOUT THE SECTOR DUE TO WX. I BECAME DISTR PERFORMING OTHER DUTIES AND WAS ALERTED TO TFC AT FL190 (ACR X) BY THE MGW SECTOR RADAR CTLR. THIS WAS BEFORE CONFLICT ALERT ACTIVATED. I ISSUED ACR Y A TURN TO HDG 070 DEGS AND EXPEDITE DSCNT THROUGH FL180 (THE ACFT WAS THROUGH FL195 AT THE TIME). SUBSEQUENTLY ACR Y ADVISED HE COULD NOT TURN R BEYOND 360 DEGS DUE TO WX AND SEPARATION WAS LOST.

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.