A flight crew reported a deviation from a departure clearance due to a communication issue with ATC.

Attributes
ACN	1312050
Time
Date	201511
Local Time Of Day	0601-1200
Place
Locale Reference	CLT.Airport
State Reference	NC
Aircraft 1
Make Model Name	Medium Large Transport Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 121
Flight Phase	Climb
Route In Use	SID ESTRR1
Flight Plan	IFR
Person 1
Function	First Officer Pilot Flying
Events
Anomaly	ATC Issue All Types Deviation - Procedural Clearance Deviation - Procedural Published Material / Policy Deviation - Track / Heading All Types

Narrative:

When we received a takeoff clearance for 36C we were instructed 'cleared for takeoff fly runway heading'. Upon taking off and flying runway heading tower told us we should be turning to a 330 heading as it states on the departure procedure (ESTRR1). However according to the procedure we are to do a 330 or last assigned by ATC. We were last assigned runway heading so this is what we were doing.a simple miscommunication between flight crew and ATC.

Original NASA ASRS Text

Title: A flight crew reported a deviation from a departure clearance due to a communication issue with ATC.

Narrative: When we received a takeoff clearance for 36C we were instructed 'cleared for takeoff fly runway heading'. Upon taking off and flying runway heading tower told us we should be turning to a 330 heading as it states on the departure procedure (ESTRR1). However according to the procedure we are to do a 330 or last assigned by ATC. We were last assigned runway heading so this is what we were doing.A simple miscommunication between flight crew and ATC.

Data retrieved from NASA's ASRS site 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.