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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Navigation equipment failure. Loss of adiru information mandates the diversion to, fuel dumping and landing by a B777 at lhr, first officer.
| Attributes | |
| ACN | 539846 |
| Time | |
| Date | 200203 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | intersection : dogal |
| State Reference | FO |
| Altitude | msl single value : 37000 |
| Environment | |
| Flight Conditions | VMC |
| Aircraft 1 | |
| Controlling Facilities | artcc : egtt.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B777 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 120 flight time total : 5500 |
| ASRS Report | 539846 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : eicas other flight crewa other flight crewb |
| Resolutory Action | controller : issued new clearance flight crew : diverted to another airport flight crew : landed as precaution flight crew : overrode automation other |
| Consequence | other other Other |
| Supplementary | |
| Problem Areas | Aircraft Company Maintenance Human Performance Chart Or Publication |
| Primary Problem | Aircraft |
Narrative:
We noticed EICAS message 'no land 3' so we notified maintenance coordination and ord dispatch. We also sent maintenance several status messages including air data information reference unit. Maintenance coordination replied that all was ok to continue, so we told them to notify ord dispatch. At approximately waypoint dogal, dispatch sent a message that we were 'no rvsm and class 1 only.' since we were not in either yet, I believe it would be best to consider stopping lhr. We got cleared to lhr, dumped fuel and landing was normal.
Original NASA ASRS Text
Title: NAV EQUIP FAILURE. LOSS OF ADIRU INFO MANDATES THE DIVERSION TO, FUEL DUMPING AND LNDG BY A B777 AT LHR, FO.
Narrative: WE NOTICED EICAS MESSAGE 'NO LAND 3' SO WE NOTIFIED MAINT COORD AND ORD DISPATCH. WE ALSO SENT MAINT SEVERAL STATUS MESSAGES INCLUDING AIR DATA INFO REF UNIT. MAINT COORD REPLIED THAT ALL WAS OK TO CONTINUE, SO WE TOLD THEM TO NOTIFY ORD DISPATCH. AT APPROX WAYPOINT DOGAL, DISPATCH SENT A MESSAGE THAT WE WERE 'NO RVSM AND CLASS 1 ONLY.' SINCE WE WERE NOT IN EITHER YET, I BELIEVE IT WOULD BE BEST TO CONSIDER STOPPING LHR. WE GOT CLRED TO LHR, DUMPED FUEL AND LNDG WAS NORMAL.
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.