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Erroneous rapidly scrolling EICAS warning messages force B747-400 flight crew to dump fuel and return to departure airport.
| Attributes | |
| ACN | 789884 |
| Time | |
| Date | 200806 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : zoa.artcc |
| State Reference | CA |
| Altitude | msl single value : 30000 |
| Aircraft 1 | |
| Controlling Facilities | artcc : zoa.artcc artcc : zfw.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B747-400 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Experience | flight time last 90 days : 220 flight time total : 25000 flight time type : 5000 |
| ASRS Report | 789884 |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | aircraft equipment other aircraft equipment : inappropriate eicas display other flight crewa |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
Received numerous warnings and alerts that were obviously erroneous. Upper and lower EICAS were scrolling through all system and couldn't get it to stop. Worked with dispatch and maintenance control to find a fix. Were unable to fix the problem and decision was made to return to lax. Dumped fuel. Returned to lax for a slightly overweight normal landing.
Original NASA ASRS Text
Title: ERRONEOUS RAPIDLY SCROLLING EICAS WARNING MESSAGES FORCE B747-400 FLT CREW TO DUMP FUEL AND RETURN TO DEP ARPT.
Narrative: RECEIVED NUMEROUS WARNINGS AND ALERTS THAT WERE OBVIOUSLY ERRONEOUS. UPPER AND LOWER EICAS WERE SCROLLING THROUGH ALL SYS AND COULDN'T GET IT TO STOP. WORKED WITH DISPATCH AND MAINT CTL TO FIND A FIX. WERE UNABLE TO FIX THE PROB AND DECISION WAS MADE TO RETURN TO LAX. DUMPED FUEL. RETURNED TO LAX FOR A SLIGHTLY OVERWT NORMAL LNDG.
Data retrieved from NASA's ASRS site as of May 2009 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.