Aircraft flight crew readback a 20 degree right clearance without challenge by ZNY controller, later stating the flight crew turned right instead of left.

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Attributes
ACN	531963
Time
Date	200112
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	intersection : zizzi
State Reference	NJ
Altitude	msl single value : 31000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zny.artcc tracon : mco.tracon
Operator	common carrier : air carrier
Make Model Name	A319
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : intermediate altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zny.artcc
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp pilot : cfi
Experience	flight time last 90 days : 700 flight time total : 13800 flight time type : 400
ASRS Report	531963
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	non adherence : published procedure
Independent Detector	atc equipment other atc equipment : radar other controllera
Resolutory Action	controller : issued advisory
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance
Primary Problem	ATC Human Performance

Narrative:

Asked for lower altitude due to turbulence. Controller on frequency 133.12 said 'turn right 20 degrees descend to FL290.' both pilots heard turn right and first officer read back 'turn right 20 degrees.' turn was due to traffic climbing up and opposite direction to us. Five to ten mins later controller said 'turn to 240 degrees' and you should have turned left. We replied we had read back turn right. Basically we ahd passed the climbing aircraft on the let instead of the right. However, controller never made mention that we had initially turned the wrong direction until we had passed the other aircraft. Either he saw the turn was wrong and didn't say anything, or it didn't matter.

Original NASA ASRS Text

Title: ACFT FLC READBACK A 20 DEG RIGHT CLRNC WITHOUT CHALLENGE BY ZNY CTLR, LATER STATING THE FLC TURNED RIGHT INSTEAD OF LEFT.

Narrative: ASKED FOR LOWER ALT DUE TO TURB. CTLR ON FREQ 133.12 SAID 'TURN RIGHT 20 DEGS DSND TO FL290.' BOTH PLTS HEARD TURN RIGHT AND FO READ BACK 'TURN RIGHT 20 DEGS.' TURN WAS DUE TO TFC CLBING UP AND OPPOSITE DIRECTION TO US. FIVE TO TEN MINS LATER CTLR SAID 'TURN TO 240 DEGS' AND YOU SHOULD HAVE TURNED LEFT. WE REPLIED WE HAD READ BACK TURN RIGHT. BASICALLY WE AHD PASSED THE CLBING ACFT ON THE LET INSTEAD OF THE RIGHT. HOWEVER, CTLR NEVER MADE MENTION THAT WE HAD INITIALLY TURNED THE WRONG DIRECTION UNTIL WE HAD PASSED THE OTHER ACFT. EITHER HE SAW THE TURN WAS WRONG AND DIDN'T SAY ANYTHING, OR IT DIDN'T MATTER.

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.