A B737 climbing out of las was given a turn for traffic and refused the clearance due to a WX cell. The ARTCC radar controller then descended the B737 and advised him to call the ARTCC due to a possible loss of separation.

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Attributes
ACN	368540
Time
Date	199705
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : bty airport : las
State Reference	NV
Altitude	msl bound lower : 24000 msl bound upper : 24000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zla tracon : bos
Operator	common carrier : air carrier
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude descent other
Route In Use	departure other enroute : on vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	other : unknown
Flight Phase	descent other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 230 flight time total : 8400 flight time type : 1200
ASRS Report	368540
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 10000 flight time type : 7000
ASRS Report	368704
Events
Anomaly	conflict : airborne less severe inflight encounter : weather non adherence : required legal separation
Independent Detector	other controllera other flight crewa
Resolutory Action	controller : issued new clearance other
Consequence	faa : investigated
Miss Distance	horizontal : 30000 vertical : 0
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	other

Narrative:

During climb out through FL240, ZLA instructed us to turn left to heading 275 degrees. Our heading was 300 degrees. We told ZLA we were unable to comply with turn instruction as there was WX in that direction. The controller then told us to descend to FL230. At that time we stopped our climb and descended to FL230. The controller advised us to contact the center on the landline as a loss of separation possibly occurred. Supplemental information from acn 368704: apparently there was another aircraft to our right descending. After the controller found out we couldn't turn to the left, I wonder why this aircraft was not turned.

Original NASA ASRS Text

Title: A B737 CLBING OUT OF LAS WAS GIVEN A TURN FOR TFC AND REFUSED THE CLRNC DUE TO A WX CELL. THE ARTCC RADAR CTLR THEN DSNDED THE B737 AND ADVISED HIM TO CALL THE ARTCC DUE TO A POSSIBLE LOSS OF SEPARATION.

Narrative: DURING CLBOUT THROUGH FL240, ZLA INSTRUCTED US TO TURN L TO HDG 275 DEGS. OUR HDG WAS 300 DEGS. WE TOLD ZLA WE WERE UNABLE TO COMPLY WITH TURN INSTRUCTION AS THERE WAS WX IN THAT DIRECTION. THE CTLR THEN TOLD US TO DSND TO FL230. AT THAT TIME WE STOPPED OUR CLB AND DSNDED TO FL230. THE CTLR ADVISED US TO CONTACT THE CTR ON THE LANDLINE AS A LOSS OF SEPARATION POSSIBLY OCCURRED. SUPPLEMENTAL INFO FROM ACN 368704: APPARENTLY THERE WAS ANOTHER ACFT TO OUR R DSNDING. AFTER THE CTLR FOUND OUT WE COULDN'T TURN TO THE L, I WONDER WHY THIS ACFT WAS NOT TURNED.

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.