Narrative:

Was on climb-out from sjc runway 30R on IFR flight plan assigned climb via the SJC2 departure; moony sjc then on course. This flight sequence including the SJC2 departure; moony transition; sjc VOR as next waypoint; and subsequent route was programmed into FMS (garmin G3000). The full programmed sequence in the G3000 was: sjc 30L.SJC2.moony sjc bmrng hrner. Flight plan in G3000 was reviewed before takeoff and after event; and I believe it was programmed correctly.on the 30R.SJC2 departure; there is a right climbing turn to 113 heading direct to moony waypoint.I was climbing out with the FMS autopilot coupled; and completed the right climbing turn to 113 heading. Instead of sequencing to continue to the moony waypoint; the FMS apparently ignored the moony waypoint in the programmed flight plan; and instead immediately sequenced forward to the sjc VOR; and thus commanded an incorrect tight right turn direct to the sjc VOR.I detected the incorrect turn situation and was correcting back to moony; however; the norcal departure controller at that time also identified the incorrect turn and directed me to continue the short climbing turn directly to sjc VOR and then on course. From there; I continued the flight on to destination without any further issue; and there was no apparent conflict situation or safety of flight issue.my mentor pilot / CFI (pilot not-flying; right seat) described that he had seen this problem previously with the G3000 in the emb-505; whereby the position of the plane at the time the event happened; the moony waypoint ahead; and the sjc VOR immediately behind us would cause the aircraft to skip the intermediate moony waypoint because it formed a sharp acute angle (angle formed by point abeam and just east of sjc; the moony waypoint; and then back to the sjc VOR.it should be determined whether this was an individual or systematic error in performance of the G3000 FMS due to the configuration of aircraft position and waypoints; or a human factors issue by which the G3000 flight plan and the 30R.SJC2.moony departure could be entered incorrectly without being detected by pilot flying or pilot not-flying.

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Original NASA ASRS Text

Title: EMB-505 Captain reported the FMS; a Garmin 3000; exhibited an anomaly that led to a track deviation.

Narrative: Was on climb-out from SJC RWY 30R on IFR flight plan assigned climb via the SJC2 departure; MOONY SJC then on course. This flight sequence including the SJC2 departure; MOONY transition; SJC VOR as next waypoint; and subsequent route was programmed into FMS (Garmin G3000). The full programmed sequence in the G3000 was: SJC 30L.SJC2.MOONY SJC BMRNG HRNER. Flight plan in G3000 was reviewed before takeoff and after event; and I believe it was programmed correctly.On the 30R.SJC2 departure; there is a right climbing turn to 113 heading direct to MOONY waypoint.I was climbing out with the FMS Autopilot coupled; and completed the right climbing turn to 113 heading. Instead of sequencing to continue to the MOONY waypoint; the FMS apparently ignored the MOONY waypoint in the programmed flight plan; and instead immediately sequenced forward to the SJC VOR; and thus commanded an incorrect tight right turn direct to the SJC VOR.I detected the incorrect turn situation and was correcting back to MOONY; however; the NorCal Departure Controller at that time also identified the incorrect turn and directed me to continue the short climbing turn directly to SJC VOR and then on course. From there; I continued the flight on to destination without any further issue; and there was no apparent conflict situation or safety of flight issue.My mentor pilot / CFI (Pilot Not-Flying; right seat) described that he had seen this problem previously with the G3000 in the EMB-505; whereby the position of the plane at the time the event happened; the MOONY waypoint ahead; and the SJC VOR immediately behind us would cause the aircraft to skip the intermediate MOONY waypoint because it formed a sharp acute angle (angle formed by point abeam and just east of SJC; the MOONY waypoint; and then back to the SJC VOR.It should be determined whether this was an individual or systematic error in performance of the G3000 FMS due to the configuration of aircraft position and waypoints; or a human factors issue by which the G3000 flight plan and the 30R.SJC2.MOONY departure could be entered incorrectly without being detected by Pilot Flying or Pilot Not-Flying.

Data retrieved from NASA's ASRS site 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.