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ATC intervened to advise flight crew of a B737-300 that they were 20 mi off course. Flight crew discovered that the aircraft FMC routing was different than the actual clearance given by ATC.
| Attributes | |
| ACN | 363420 |
| Time | |
| Date | 199703 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : sax |
| State Reference | NJ |
| Altitude | msl bound lower : 33000 msl bound upper : 33000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Route In Use | enroute : direct enroute airway : zny |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 240 flight time total : 9000 flight time type : 3000 |
| ASRS Report | 363420 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | non adherence : clearance other spatial deviation |
| Independent Detector | other controllera |
| Resolutory Action | flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Routing in FMC was different than flight plan routing. The FMC routing was a company preloaded routing. Center controller informed us that we were 20 mi from flight plan route. We then discovered discrepancy. Both pilots failed to verify FMC routing with routing on dispatch release. It was the last leg of a 4 day trip where we had gone from night flying (XA30 am arrival in baltimore) on first day to YA00 am departure from columbus on last day.
Original NASA ASRS Text
Title: ATC INTERVENED TO ADVISE FLC OF A B737-300 THAT THEY WERE 20 MI OFF COURSE. FLC DISCOVERED THAT THE ACFT FMC ROUTING WAS DIFFERENT THAN THE ACTUAL CLRNC GIVEN BY ATC.
Narrative: ROUTING IN FMC WAS DIFFERENT THAN FLT PLAN ROUTING. THE FMC ROUTING WAS A COMPANY PRELOADED ROUTING. CTR CTLR INFORMED US THAT WE WERE 20 MI FROM FLT PLAN RTE. WE THEN DISCOVERED DISCREPANCY. BOTH PLTS FAILED TO VERIFY FMC ROUTING WITH ROUTING ON DISPATCH RELEASE. IT WAS THE LAST LEG OF A 4 DAY TRIP WHERE WE HAD GONE FROM NIGHT FLYING (XA30 AM ARR IN BALTIMORE) ON FIRST DAY TO YA00 AM DEP FROM COLUMBUS ON LAST DAY.
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.