Narrative:

Departed tdw in VMC conditions on radar vectors to ama VOR and V304. Climbed to on top of scattered/broken conditions VFR. Just as I was arriving at ama VOR and resetting my HSI to V304, my passenger accidentally opened window. The distraction interrupted my setting the HSI and I misset it and ended on the wrong course. ATC pointed this out to me, and with red face I set the HSI correctly, flew to lnk and landed (ILS approach). I believe part of the problem was also caused by fatigue; I had been overworking and under business stress the last 3 weeks, and the night of the xx I did not get enough rest. Missetting the HSI bothered me greatly (and still does) even though in VMC, and I have decided to take a couple of days off in lnk and rest up prior to returning to tus. Fatigue can be quite deceptive and sneaky at times, and this incident has given me much food for thought. In aviation, large problems can come from small mistakes.

Google
 

Original NASA ASRS Text

Title: TRACK DEVIATION.

Narrative: DEPARTED TDW IN VMC CONDITIONS ON RADAR VECTORS TO AMA VOR AND V304. CLBED TO ON TOP OF SCATTERED/BROKEN CONDITIONS VFR. JUST AS I WAS ARRIVING AT AMA VOR AND RESETTING MY HSI TO V304, MY PAX ACCIDENTALLY OPENED WINDOW. THE DISTR INTERRUPTED MY SETTING THE HSI AND I MISSET IT AND ENDED ON THE WRONG COURSE. ATC POINTED THIS OUT TO ME, AND WITH RED FACE I SET THE HSI CORRECTLY, FLEW TO LNK AND LANDED (ILS APCH). I BELIEVE PART OF THE PROB WAS ALSO CAUSED BY FATIGUE; I HAD BEEN OVERWORKING AND UNDER BUSINESS STRESS THE LAST 3 WKS, AND THE NIGHT OF THE XX I DID NOT GET ENOUGH REST. MISSETTING THE HSI BOTHERED ME GREATLY (AND STILL DOES) EVEN THOUGH IN VMC, AND I HAVE DECIDED TO TAKE A COUPLE OF DAYS OFF IN LNK AND REST UP PRIOR TO RETURNING TO TUS. FATIGUE CAN BE QUITE DECEPTIVE AND SNEAKY AT TIMES, AND THIS INCIDENT HAS GIVEN ME MUCH FOOD FOR THOUGHT. IN AVIATION, LARGE PROBS CAN COME FROM SMALL MISTAKES.

Data retrieved from NASA's ASRS site as of July 2007 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.