ARTCC radar controller issued wrong direction turn to flight crew of an large transport since both heard clearance and turned accordingly. However, controller came back and said that the crew had turned the wrong way. There was no known traffic conflict.

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Attributes
ACN	417986
Time
Date	199810
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : lin
State Reference	CA
Altitude	msl bound lower : 29000 msl bound upper : 29000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zoa
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	cruise other
Route In Use	enroute airway : zoa
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : commercial pilot : flight engineer pilot : instrument pilot : atp
Experience	flight time last 90 days : 200 flight time total : 10000 flight time type : 2000
ASRS Report	417986
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : commercial
Experience	flight time last 90 days : 46 flight time total : 6000 flight time type : 46
ASRS Report	418180
Events
Anomaly	other anomaly other
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other

Narrative:

ATC issued turn 15 degrees to the right for traffic. Right turn was executed. After flying a few mins on new heading, ATC said that we were told to turn left 15 degrees, not right 15 degrees. No known traffic.

Original NASA ASRS Text

Title: ARTCC RADAR CTLR ISSUED WRONG DIRECTION TURN TO FLC OF AN LGT SINCE BOTH HEARD CLRNC AND TURNED ACCORDINGLY. HOWEVER, CTLR CAME BACK AND SAID THAT THE CREW HAD TURNED THE WRONG WAY. THERE WAS NO KNOWN TFC CONFLICT.

Narrative: ATC ISSUED TURN 15 DEGS TO THE R FOR TFC. R TURN WAS EXECUTED. AFTER FLYING A FEW MINS ON NEW HDG, ATC SAID THAT WE WERE TOLD TO TURN L 15 DEGS, NOT R 15 DEGS. NO KNOWN TFC.

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.