Narrative:

Departed kimpo airport at 2300 ft left turn to heading of 220 degrees, established on heading radial 300 degrees off of anyang showed alive and that we had already went past the radial. We corrected and then short time later it went full deflection the other way. As we started correcting, departure controller gave us a heading of 180 degrees and then cleared us direct to anyang VOR. When passing VOR we had 86 degree radial set. When passing station full left deflection on course, we corrected at about 4.5 mi past the VOR. The VOR needle went full right deflection as we started to correct. The controller gave us another heading correction for interception airway then direct to karub. Altitude first time was about 5000 ft. The second time for correction altitude was about 8000 ft. No other traffic or aircraft in area at time of occurrence. Suspect problem with ground station at time or problem with equipment in aircraft.

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Original NASA ASRS Text

Title: DC8 DEPARTING SEL HAS NAV INSTS INDICATE IMPROPERLY.

Narrative: DEPARTED KIMPO ARPT AT 2300 FT L TURN TO HDG OF 220 DEGS, ESTABLISHED ON HDG RADIAL 300 DEGS OFF OF ANYANG SHOWED ALIVE AND THAT WE HAD ALREADY WENT PAST THE RADIAL. WE CORRECTED AND THEN SHORT TIME LATER IT WENT FULL DEFLECTION THE OTHER WAY. AS WE STARTED CORRECTING, DEP CTLR GAVE US A HDG OF 180 DEGS AND THEN CLRED US DIRECT TO ANYANG VOR. WHEN PASSING VOR WE HAD 86 DEG RADIAL SET. WHEN PASSING STATION FULL L DEFLECTION ON COURSE, WE CORRECTED AT ABOUT 4.5 MI PAST THE VOR. THE VOR NEEDLE WENT FULL R DEFLECTION AS WE STARTED TO CORRECT. THE CTLR GAVE US ANOTHER HDG CORRECTION FOR INTERCEPTION AIRWAY THEN DIRECT TO KARUB. ALT FIRST TIME WAS ABOUT 5000 FT. THE SECOND TIME FOR CORRECTION ALT WAS ABOUT 8000 FT. NO OTHER TFC OR ACFT IN AREA AT TIME OF OCCURRENCE. SUSPECT PROB WITH GND STATION AT TIME OR PROB WITH EQUIP IN ACFT.

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.