A B767 departs from ord, il, only to receive a new clearance. Flight crew flies what they hear but it's not what controller issued.

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Attributes
ACN	388620
Time
Date	199712
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : ord
State Reference	IL
Altitude	msl bound lower : 6000 msl bound upper : 6000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : ord
Operator	common carrier : air carrier
Make Model Name	B767 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude climbout : initial
Route In Use	departure other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	388620
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	other spatial deviation
Independent Detector	atc equipment other atc equipment : unspecified other controllera
Resolutory Action	controller : issued new clearance
Consequence	Other
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	other

Narrative:

XA20Z, 125.0, 6000 ft, ord departure control. Departing ord, frequency change from tower to departure control. New clearance received from 5000 ft heading 110 degrees to new clearance to 6000 ft, heading 360 degrees. Established on heading and altitude, departure control queried our heading saying we weren't cleared to a new heading. Controller then said to remain on 360 degree heading. No traffic conflict, no problem.

Original NASA ASRS Text

Title: A B767 DEPARTS FROM ORD, IL, ONLY TO RECEIVE A NEW CLRNC. FLC FLIES WHAT THEY HEAR BUT IT'S NOT WHAT CTLR ISSUED.

Narrative: XA20Z, 125.0, 6000 FT, ORD DEP CTL. DEPARTING ORD, FREQ CHANGE FROM TWR TO DEP CTL. NEW CLRNC RECEIVED FROM 5000 FT HDG 110 DEGS TO NEW CLRNC TO 6000 FT, HDG 360 DEGS. ESTABLISHED ON HDG AND ALT, DEP CTL QUERIED OUR HDG SAYING WE WEREN'T CLRED TO A NEW HDG. CTLR THEN SAID TO REMAIN ON 360 DEG HDG. NO TFC CONFLICT, NO PROB.

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.