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A300 B4 aircraft omega navigation was in error en route. Flight crew realized it after receiving their destination VOR. Reporter captain believes it may have been attributed to erroneous wind in the omega.
| Attributes | |
| ACN | 373563 |
| Time | |
| Date | 199707 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : bda |
| State Reference | FO |
| Altitude | msl bound lower : 28000 msl bound upper : 28000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | A300 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Route In Use | enroute airway : zny |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 170 flight time total : 13000 flight time type : 1200 |
| ASRS Report | 373563 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence : clearance other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | controller : issued new clearance |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Navigational Facility |
| Air Traffic Incident | other |
Narrative:
The flight was a scheduled passenger flight from jfk to sju. The clearance was jfk-shipp-linnd-didle-downt-A300-ddp NDB-sju. The aircraft is equipped with a single omega. After departure the omega was checked for accuracy and found ok for navigation. After about 1 1/2 hours of flight we started receiving bda VOR. We became suspicious of a navigation error. Our position was 180 NM, 310 degree radial from bda, approximately 80 NM east of course. The omega was updated, new york arinc was advised and ZNY got us on radar. We were cleared direct to holma intersection. At this time we started to receive ddp NDB. On arrival in sju the omega was written up in the logbook. Contributing factors to the navigation error are the use of a single omega. The omega may not have had the right wind, and then the jetstream could easily have made the aircraft drift the 80 NM.
Original NASA ASRS Text
Title: A300 B4 ACFT OMEGA NAV WAS IN ERROR ENRTE. FLC REALIZED IT AFTER RECEIVING THEIR DEST VOR. RPTR CAPT BELIEVES IT MAY HAVE BEEN ATTRIBUTED TO ERRONEOUS WIND IN THE OMEGA.
Narrative: THE FLT WAS A SCHEDULED PAX FLT FROM JFK TO SJU. THE CLRNC WAS JFK-SHIPP-LINND-DIDLE-DOWNT-A300-DDP NDB-SJU. THE ACFT IS EQUIPPED WITH A SINGLE OMEGA. AFTER DEP THE OMEGA WAS CHKED FOR ACCURACY AND FOUND OK FOR NAV. AFTER ABOUT 1 1/2 HRS OF FLT WE STARTED RECEIVING BDA VOR. WE BECAME SUSPICIOUS OF A NAV ERROR. OUR POS WAS 180 NM, 310 DEG RADIAL FROM BDA, APPROX 80 NM E OF COURSE. THE OMEGA WAS UPDATED, NEW YORK ARINC WAS ADVISED AND ZNY GOT US ON RADAR. WE WERE CLRED DIRECT TO HOLMA INTXN. AT THIS TIME WE STARTED TO RECEIVE DDP NDB. ON ARR IN SJU THE OMEGA WAS WRITTEN UP IN THE LOGBOOK. CONTRIBUTING FACTORS TO THE NAV ERROR ARE THE USE OF A SINGLE OMEGA. THE OMEGA MAY NOT HAVE HAD THE R WIND, AND THEN THE JETSTREAM COULD EASILY HAVE MADE THE ACFT DRIFT THE 80 NM.
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.