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FMS routing used for SID was incorrect. Reporter first officer says he checked the FMS routing against the SID and it was correct, but in-flight the FMS routing changed. Controller intervened and cleared flight crew direct, as the FMS was doing.
| Attributes | |
| ACN | 334980 |
| Time | |
| Date | 199605 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : sea |
| State Reference | WA |
| Altitude | msl bound lower : 20000 msl bound upper : 20000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zse |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : flight engineer pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 50 flight time total : 9500 flight time type : 500 |
| ASRS Report | 334980 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | other anomaly other other spatial deviation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Filed and assigned the bangr 1 departure from sea. Company had warned via bulletin that some FMS software does not match filed flight plans. As student on IOE, I did check filed route versus FMS route and both checked out as routed over tatoosh. After airborne the computer routed us bangr direct to laire, by-passing tatoosh. Controller inquired as to filed/cleared routing, and then cleared us direct to tatoosh. Event could have been avoided by being more familiar with flight plan and routing and not relying 100 percent on FMS.
Original NASA ASRS Text
Title: FMS ROUTING USED FOR SID WAS INCORRECT. RPTR FO SAYS HE CHKED THE FMS ROUTING AGAINST THE SID AND IT WAS CORRECT, BUT INFLT THE FMS ROUTING CHANGED. CTLR INTERVENED AND CLRED FLC DIRECT, AS THE FMS WAS DOING.
Narrative: FILED AND ASSIGNED THE BANGR 1 DEP FROM SEA. COMPANY HAD WARNED VIA BULLETIN THAT SOME FMS SOFTWARE DOES NOT MATCH FILED FLT PLANS. AS STUDENT ON IOE, I DID CHK FILED RTE VERSUS FMS RTE AND BOTH CHKED OUT AS ROUTED OVER TATOOSH. AFTER AIRBORNE THE COMPUTER ROUTED US BANGR DIRECT TO LAIRE, BY-PASSING TATOOSH. CTLR INQUIRED AS TO FILED/CLRED ROUTING, AND THEN CLRED US DIRECT TO TATOOSH. EVENT COULD HAVE BEEN AVOIDED BY BEING MORE FAMILIAR WITH FLT PLAN AND ROUTING AND NOT RELYING 100 PERCENT ON FMS.
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.