Narrative:

Ny departure or center cleared me direct to col. I saw cyn in the flight plan and went direct to cyn. About 20-30 minutes thereafter I had another lapse. While climbing through FL180; I did not switch my altimeter to standard atmospheric pressure; 29.92'. When I leveled off at my interim assigned altitude of FL200; I was 400 ft high. When center questioned my altitude I reported that I was at assigned altitude; then immediately realized my error.there was a considerable amount of stress prior to the flight. My wife was ill and unable to make the preplanned flight. I did not sleep well the night before. The combination of these factors impeded my ability to catch the fact that I initially was flying to the incorrect waypoint. Although I was aware that I was not functioning at my normal capability and thought that I was concentrating enough to overcome my substandard physical and mental state; apparently I was not.another complication was that my son was on board. He has not flown with me recently and was asking a lot of questions that also created some distractions. I should have either canceled the flight or if not; then been more strict on sterile cockpit procedures.

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Original NASA ASRS Text

Title: A PA-46T pilot; distracted by personal concerns and an inquiring passenger programmed the wrong 'direct to' fix and failed to adjust his altimeter to QNE passing through FL180.

Narrative: NY Departure or Center cleared me direct to COL. I saw CYN in the flight plan and went direct to CYN. About 20-30 minutes thereafter I had another lapse. While climbing through FL180; I did not switch my altimeter to standard atmospheric pressure; 29.92'. When I leveled off at my interim assigned altitude of FL200; I was 400 FT high. When Center questioned my altitude I reported that I was at assigned altitude; then immediately realized my error.There was a considerable amount of stress prior to the flight. My wife was ill and unable to make the preplanned flight. I did not sleep well the night before. The combination of these factors impeded my ability to catch the fact that I initially was flying to the incorrect waypoint. Although I was aware that I was not functioning at my normal capability and thought that I was concentrating enough to overcome my substandard physical and mental state; apparently I was not.Another complication was that my son was on board. He has not flown with me recently and was asking a lot of questions that also created some distractions. I should have either canceled the flight or if not; then been more strict on sterile cockpit procedures.

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.