Narrative:

Another instrument rated pilot along with me; on an IFR flight plan under my name made a deviation of altitude and heading. Socal called and brought [the deviations] to my attention. I corrected immediately.

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Original NASA ASRS Text

Title: The C-172 pilot of record on an IFR flight plan failed to note his assistant pilot's course and altitude deviations until advised by ATC.

Narrative: Another instrument rated pilot along with me; on an IFR flight plan under my name made a deviation of altitude and heading. Socal called and brought [the deviations] to my attention. I corrected immediately.

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.