Narrative:

I received the IFR clearance from las vegas but was informed prior to departure that the destination had been changed to san jose, ca. After switching frequencys to los angeles center, I advised them of my destination change. I received the following clearance. Cleared to san jose via bty 126 degree radial bty V105 lidat direct hyp direct sjc. I had been told to report lidat intersection, as oakland center radar in that area was apparently not working. After reporting lidat, I began a left turn towards hyp using the autoplt to turn the aircraft. I had programmed hyp in the RNAV (263 degree radial/178 NM). Unknown to me at the time, I may have inadvertently rotated the compass card of the HSI as I turned the heading bug (it is possible to do that in this aircraft). Because of the possible compass error, I believe I may have turned too far back towards the south. At the speed I was traveling (approximately 205 KTS), I would have deviated 20 NM off what my direct course should have been within about 6 to 8 mins. As the compass began slowly slaving itself back to the proper magnetic heading, I was in fact on a direct course towards hyp, except my course line was about 20-25 NM south of the course line I should have been on. I did enter a MOA, but did not enter any restr airspace. When I was handed off to the next center controller, he then requested that I call them upon reaching my destination.

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Original NASA ASRS Text

Title: ATX SMT UNAUTH PENETRATION ON MOA.

Narrative: I RECEIVED THE IFR CLRNC FROM LAS VEGAS BUT WAS INFORMED PRIOR TO DEP THAT THE DEST HAD BEEN CHANGED TO SAN JOSE, CA. AFTER SWITCHING FREQS TO LOS ANGELES CENTER, I ADVISED THEM OF MY DEST CHANGE. I RECEIVED THE FOLLOWING CLRNC. CLRED TO SAN JOSE VIA BTY 126 DEG RADIAL BTY V105 LIDAT DIRECT HYP DIRECT SJC. I HAD BEEN TOLD TO RPT LIDAT INTXN, AS OAKLAND CENTER RADAR IN THAT AREA WAS APPARENTLY NOT WORKING. AFTER RPTING LIDAT, I BEGAN A LEFT TURN TOWARDS HYP USING THE AUTOPLT TO TURN THE ACFT. I HAD PROGRAMMED HYP IN THE RNAV (263 DEG RADIAL/178 NM). UNKNOWN TO ME AT THE TIME, I MAY HAVE INADVERTENTLY ROTATED THE COMPASS CARD OF THE HSI AS I TURNED THE HDG BUG (IT IS POSSIBLE TO DO THAT IN THIS ACFT). BECAUSE OF THE POSSIBLE COMPASS ERROR, I BELIEVE I MAY HAVE TURNED TOO FAR BACK TOWARDS THE S. AT THE SPD I WAS TRAVELING (APPROX 205 KTS), I WOULD HAVE DEVIATED 20 NM OFF WHAT MY DIRECT COURSE SHOULD HAVE BEEN WITHIN ABOUT 6 TO 8 MINS. AS THE COMPASS BEGAN SLOWLY SLAVING ITSELF BACK TO THE PROPER MAGNETIC HDG, I WAS IN FACT ON A DIRECT COURSE TOWARDS HYP, EXCEPT MY COURSE LINE WAS ABOUT 20-25 NM S OF THE COURSE LINE I SHOULD HAVE BEEN ON. I DID ENTER A MOA, BUT DID NOT ENTER ANY RESTR AIRSPACE. WHEN I WAS HANDED OFF TO THE NEXT CENTER CTLR, HE THEN REQUESTED THAT I CALL THEM UPON REACHING MY DEST.

Data retrieved from NASA's ASRS site as of August 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.