Narrative:

After departure from chs we were cleared to brunswick VOR (ssi) via the ssi 2. We were flying a 180 degree heading to intercept the 218 degree radial off chs to ssi. Approximately 15 NM from chs still on a heading of 180 degrees, ZJX notified us that we had already passed the airway, although our navigation was showing us that had yet to intercept. ATC advised us to turn to 240 degrees to intercept. Since I doubted my navigation, ATC gave me a heading to brunswick (ssi) and direct when able. My copilot and I turned off and on the #1 navigation. Once established toward ssi, I asked ZJX what radial they showed me on. They replied the 218 degree radial to or 038 degree radial from ssi, which at that time was what I was showing. We proceeded direct to ssi, then continued on course. I have no explanation on how or why the CDI remained pegged on the left when we had already passed the airway. Later tests on the navigation that day revealed no discrepancies with the equipment. At the time of the situation. I asked ZJX center if it created any problems and she said 'no problems at all.' she was quite helpful. To prevent this problem in the future, I will verify that the #2 navigation is set up and crosschecked with navigation #1 before proceeding. This will reveal a potential problem before it becomes one.

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Original NASA ASRS Text

Title: AN ACR LTT, ON A DEP RADAR VECTOR FAILS TO CAPTURE THEIR OUTBOUND RADIAL. A FLC HDG TRACK POS DEV. CTR CTLR ALERTS THEM TO THE DEV.

Narrative: AFTER DEP FROM CHS WE WERE CLRED TO BRUNSWICK VOR (SSI) VIA THE SSI 2. WE WERE FLYING A 180 DEG HDG TO INTERCEPT THE 218 DEG RADIAL OFF CHS TO SSI. APPROX 15 NM FROM CHS STILL ON A HDG OF 180 DEGS, ZJX NOTIFIED US THAT WE HAD ALREADY PASSED THE AIRWAY, ALTHOUGH OUR NAV WAS SHOWING US THAT HAD YET TO INTERCEPT. ATC ADVISED US TO TURN TO 240 DEGS TO INTERCEPT. SINCE I DOUBTED MY NAV, ATC GAVE ME A HDG TO BRUNSWICK (SSI) AND DIRECT WHEN ABLE. MY COPLT AND I TURNED OFF AND ON THE #1 NAV. ONCE ESTABLISHED TOWARD SSI, I ASKED ZJX WHAT RADIAL THEY SHOWED ME ON. THEY REPLIED THE 218 DEG RADIAL TO OR 038 DEG RADIAL FROM SSI, WHICH AT THAT TIME WAS WHAT I WAS SHOWING. WE PROCEEDED DIRECT TO SSI, THEN CONTINUED ON COURSE. I HAVE NO EXPLANATION ON HOW OR WHY THE CDI REMAINED PEGGED ON THE L WHEN WE HAD ALREADY PASSED THE AIRWAY. LATER TESTS ON THE NAV THAT DAY REVEALED NO DISCREPANCIES WITH THE EQUIP. AT THE TIME OF THE SIT. I ASKED ZJX CTR IF IT CREATED ANY PROBS AND SHE SAID 'NO PROBS AT ALL.' SHE WAS QUITE HELPFUL. TO PREVENT THIS PROB IN THE FUTURE, I WILL VERIFY THAT THE #2 NAV IS SET UP AND XCHKED WITH NAV #1 BEFORE PROCEEDING. THIS WILL REVEAL A POTENTIAL PROB BEFORE IT BECOMES ONE.

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.