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B777 captain reported that several status messages appeared on EICAS and the first officer's right CDU went blank.
| Attributes | |
| ACN | 1420186 |
| Time | |
| Date | 201701 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B777 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | FMS/FMC |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Experience | Flight Crew Total 8975 Flight Crew Type 2628 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
Shortly after passing FL180 on climb out from ZZZ to ZZZZ; several status messages appeared on the EICAS. The first was 'right FMC CDU inop'. This was followed five minutes later by a 'left FMC CDU inop'. In another five minutes; a third EICAS status message appeared; 'both left and right FMC CDU inop'. Several attempts were made to switch the FMC presentation; which resulted in a status message 'right FMC CDU failure'. After blanking on and off several times; the screen of the first officer's right CDU went blank and did not return until touchdown.after consulting with dispatch; maintenance; and the flight duty manager; it was decided a return to ZZZ was prudent. ATC was notified; flight attendants and passenger were told and we turned to return for ZZZ. Fuel dumping was accomplished; 64.2 pounds dumped so as to be below max landing weight.landing was uneventful. Fire trucks examined the aircraft prior to gate return for residual fuel. After gate arrival; the right CDU had a hard failure; no power or screen presentation. Maintenance swapped the center CDU for the right CDU; and deferred the center. The aircraft was serviced and we proceeded to ZZZZ.
Original NASA ASRS Text
Title: B777 Captain reported that several status messages appeared on EICAS and the First Officer's right CDU went blank.
Narrative: Shortly after passing FL180 on climb out from ZZZ to ZZZZ; several status messages appeared on the EICAS. The first was 'right FMC CDU inop'. This was followed five minutes later by a 'left FMC CDU inop'. In another five minutes; a third EICAS status message appeared; 'Both left and right FMC CDU inop'. Several attempts were made to switch the FMC presentation; which resulted in a status message 'right FMC CDU failure'. After blanking on and off several times; the screen of the first officer's right CDU went blank and did not return until touchdown.After consulting with dispatch; maintenance; and the flight duty manager; it was decided a return to ZZZ was prudent. ATC was notified; flight attendants and passenger were told and we turned to return for ZZZ. Fuel dumping was accomplished; 64.2 LBS dumped so as to be below max landing weight.Landing was uneventful. Fire trucks examined the aircraft prior to gate return for residual fuel. After gate arrival; the right CDU had a hard failure; no power or screen presentation. Maintenance swapped the center CDU for the right CDU; and deferred the center. The aircraft was serviced and we proceeded to ZZZZ.
Data retrieved from NASA's ASRS site 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.