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A dispatcher reports that one of the company's north atlantic flts was advised that it was off course by gander oceanic. The flight's track had been amended at 2 points, but only 1 point had been transmitted to dispatch and the flight crew.
| Attributes | |
| ACN | 383696 |
| Time | |
| Date | 199710 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : czqx |
| State Reference | FO |
| Environment | |
| Light | Dawn |
| Aircraft 1 | |
| Controlling Facilities | artcc : czqx |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Route In Use | enroute : other oceanic enroute : atlantic enroute other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | other personnel |
| Qualification | other |
| ASRS Report | 383696 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | non adherence : clearance non adherence : published procedure non adherence : far other anomaly other other spatial deviation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Supplementary | |
| Air Traffic Incident | other |
Narrative:
Potential gross navigation error. One of our aircraft advised dispatch that the track message was incorrect. They were advised by gander oceanic that they had filed incorrectly the 20W point. Investigating this revealed that navigation data had received a track amendment message at oct/xa/97 XA39Z that revised the 30W and the 20W points. Dispatch track message was only changed for the 30W point as was the ib east. When rtes were built the ib east was created the overwater portion of flight plan and was thus incorrect. Dispatch did not receive a copy of the track amendment message and therefore, had nothing to xchk routing from original track message. Flight was advised at the 40W position report to confirm their 20W point. It was at this time that ATC intervention was required to avoid a gross navigation error. Several other flts had the same filing on track xray. The other flts were advised and rtes were corrected along with the correct coordinates for track xray.
Original NASA ASRS Text
Title: A DISPATCHER RPTS THAT ONE OF THE COMPANY'S NORTH ATLANTIC FLTS WAS ADVISED THAT IT WAS OFF COURSE BY GANDER OCEANIC. THE FLT'S TRACK HAD BEEN AMENDED AT 2 POINTS, BUT ONLY 1 POINT HAD BEEN XMITTED TO DISPATCH AND THE FLC.
Narrative: POTENTIAL GROSS NAV ERROR. ONE OF OUR ACFT ADVISED DISPATCH THAT THE TRACK MESSAGE WAS INCORRECT. THEY WERE ADVISED BY GANDER OCEANIC THAT THEY HAD FILED INCORRECTLY THE 20W POINT. INVESTIGATING THIS REVEALED THAT NAV DATA HAD RECEIVED A TRACK AMENDMENT MESSAGE AT OCT/XA/97 XA39Z THAT REVISED THE 30W AND THE 20W POINTS. DISPATCH TRACK MESSAGE WAS ONLY CHANGED FOR THE 30W POINT AS WAS THE IB EAST. WHEN RTES WERE BUILT THE IB EAST WAS CREATED THE OVERWATER PORTION OF FLT PLAN AND WAS THUS INCORRECT. DISPATCH DID NOT RECEIVE A COPY OF THE TRACK AMENDMENT MESSAGE AND THEREFORE, HAD NOTHING TO XCHK ROUTING FROM ORIGINAL TRACK MESSAGE. FLT WAS ADVISED AT THE 40W POS RPT TO CONFIRM THEIR 20W POINT. IT WAS AT THIS TIME THAT ATC INTERVENTION WAS REQUIRED TO AVOID A GROSS NAV ERROR. SEVERAL OTHER FLTS HAD THE SAME FILING ON TRACK XRAY. THE OTHER FLTS WERE ADVISED AND RTES WERE CORRECTED ALONG WITH THE CORRECT COORDINATES FOR TRACK XRAY.
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.