Narrative:

We had switched to memphis center while beginning our arrival to dfw. ATC gave us a heads up about weather over fsm. We had both heard and understood that we were cleared to deviate as required then direct byp when able. I thought I had read that back as well; but in all honesty I could be wrong. We deviated right of course to be upwind of the weather. ATC queried us after a few minutes and said that he had cleared us to deviate left as required then direct. If so; we missed that; maybe in anticipation of needing to go upwind (right); we only heard the 'as required' bit. No traffic conflicts were imminent; so ATC allowed us to stay right with a subsequent descent clearance to avoid traffic downstream.

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Original NASA ASRS Text

Title: A flight crew deviated right to stay upwind of weather; but were advised by ATC that deviation clearance left was given. To resolve the conflict a descent clearance was given.

Narrative: We had switched to Memphis Center while beginning our arrival to DFW. ATC gave us a heads up about weather over FSM. We had both heard and understood that we were cleared to deviate as required then direct BYP when able. I thought I had read that back as well; but in all honesty I could be wrong. We deviated right of course to be upwind of the weather. ATC queried us after a few minutes and said that he had cleared us to deviate left as required then direct. If so; we missed that; maybe in anticipation of needing to go upwind (right); we only heard the 'as required' bit. No traffic conflicts were imminent; so ATC allowed us to stay right with a subsequent descent clearance to avoid traffic downstream.

Data retrieved from NASA's ASRS site as of April 2012 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.