Narrative:

After departing XXX we were cleared direct xyz VOR, which was entered into the GNS-X's FMS. Everything appeared normal until ATC directed us to turn right 90 degrees to avoid a restr area where live fire was taking place. We executed the turn as directed and a short while later we were reclred direct to xyz. The FMS depicted the VOR ahead and to the left, so we turned left to proceed to the VOR. ATC then told us to check our FMS since we were heading back into the restr area. By this time I had tuned the VOR frequency on my navigation which showed the VOR ahead and to our right. I followed its commands and notified ATC that we would be using VOR/DME for the remainder of the flight, not the FMS. We were unable to resolve the discrepancy with the FMS, but our conclusion is that somewhere we must have entered the data incorrectly, even though both crew are experienced with this type FMS and the required steps to enter the data are simple. Our company's SOP dictates that 1 crew member has regular VOR/DME tuned in at all times to back up the FMS, but this morning we were complacent and distraction by other duties during the climb out and hadn't yet settled into the routine. In summary, I recognize the importance of backing up the FMS with normal VOR/DME navigation, even under routine circumstances, a little doublechking would have prevented tossing the passenger into a steep, unplanned turn.

Google
 

Original NASA ASRS Text

Title: A CPR C560 FLC FAILS TO AVOID A RESTR AREA WHEN NAVING ON FMS ONLY, DID NOT HAVE THE DQO VOR TUNED FOR BACK-UP DISPLAY WHEN ON FREQ WITH ZDC, DC.

Narrative: AFTER DEPARTING XXX WE WERE CLRED DIRECT XYZ VOR, WHICH WAS ENTERED INTO THE GNS-X'S FMS. EVERYTHING APPEARED NORMAL UNTIL ATC DIRECTED US TO TURN R 90 DEGS TO AVOID A RESTR AREA WHERE LIVE FIRE WAS TAKING PLACE. WE EXECUTED THE TURN AS DIRECTED AND A SHORT WHILE LATER WE WERE RECLRED DIRECT TO XYZ. THE FMS DEPICTED THE VOR AHEAD AND TO THE L, SO WE TURNED L TO PROCEED TO THE VOR. ATC THEN TOLD US TO CHK OUR FMS SINCE WE WERE HDG BACK INTO THE RESTR AREA. BY THIS TIME I HAD TUNED THE VOR FREQ ON MY NAV WHICH SHOWED THE VOR AHEAD AND TO OUR R. I FOLLOWED ITS COMMANDS AND NOTIFIED ATC THAT WE WOULD BE USING VOR/DME FOR THE REMAINDER OF THE FLT, NOT THE FMS. WE WERE UNABLE TO RESOLVE THE DISCREPANCY WITH THE FMS, BUT OUR CONCLUSION IS THAT SOMEWHERE WE MUST HAVE ENTERED THE DATA INCORRECTLY, EVEN THOUGH BOTH CREW ARE EXPERIENCED WITH THIS TYPE FMS AND THE REQUIRED STEPS TO ENTER THE DATA ARE SIMPLE. OUR COMPANY'S SOP DICTATES THAT 1 CREW MEMBER HAS REGULAR VOR/DME TUNED IN AT ALL TIMES TO BACK UP THE FMS, BUT THIS MORNING WE WERE COMPLACENT AND DISTR BY OTHER DUTIES DURING THE CLBOUT AND HADN'T YET SETTLED INTO THE ROUTINE. IN SUMMARY, I RECOGNIZE THE IMPORTANCE OF BACKING UP THE FMS WITH NORMAL VOR/DME NAV, EVEN UNDER ROUTINE CIRCUMSTANCES, A LITTLE DOUBLECHKING WOULD HAVE PREVENTED TOSSING THE PAX INTO A STEEP, UNPLANNED TURN.

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.