B737 flight crew experienced a taxiway incursion. No conflict was reported.

Attributes
ACN	1047194
Time
Date	201211
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Dawn
Aircraft 1
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Taxi
Flight Plan	IFR
Person 1
Function	Pilot Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 149
Person 2
Function	Pilot Not Flying First Officer
Experience	Flight Crew Last 90 Days 161
Events
Anomaly	Deviation - Procedural Published Material / Policy Deviation - Procedural Clearance Ground Incursion Taxiway

Narrative:

Prior to pushback; the first officer and I reviewed the commercial charts. Prior to taxi; I was unaware that he called ramp control on #2 radio while I was on #1 radio; so I did not hear the clearance. He said ramp cleared us to taxi onto taxiway alpha; right on RA; contact ground. As I began a right turn onto taxiway alpha; he said; 'no; turn left'. I turned back onto the ramp to taxiway RA thinking I misunderstood our clearance. I asked the first officer to verify our clearance. He replied; 'taxiway alpha to taxiway RA'. I said 'I was turning onto taxiway alpha; but you directed me onto the ramp'. The first officer then realized he was confused between ramp and taxiway alpha. There were no airplanes moving on the ramp or pushing from any gate.

Original NASA ASRS Text

Title: B737 flight crew experienced a taxiway incursion. No conflict was reported.

Narrative: Prior to pushback; the First Officer and I reviewed the Commercial Charts. Prior to taxi; I was unaware that he called Ramp Control on #2 radio while I was on #1 radio; so I did not hear the clearance. He said Ramp cleared us to taxi onto Taxiway Alpha; right on RA; contact Ground. As I began a right turn onto Taxiway Alpha; he said; 'No; turn left'. I turned back onto the ramp to Taxiway RA thinking I misunderstood our clearance. I asked the First Officer to verify our clearance. He replied; 'Taxiway Alpha to Taxiway RA'. I said 'I was turning onto Taxiway Alpha; but you directed me onto the ramp'. The First Officer then realized he was confused between ramp and Taxiway Alpha. There were no airplanes moving on the ramp or pushing from any gate.

Data retrieved from NASA's ASRS site as of July 2013 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.