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B787 captain reported that an autotransformer rectifier failed subsequently causing a fuel imbalance. Crew decided to divert.
| Attributes | |
| ACN | 1543548 |
| Time | |
| Date | 201805 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Environment | |
| Flight Conditions | IMC |
| Aircraft 1 | |
| Make Model Name | B787 Dreamliner Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | DC Rectifier |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine |
| Experience | Flight Crew Last 90 Days 185 Flight Crew Total 5896 Flight Crew Type 1036 |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural Weight And Balance Inflight Event / Encounter Fuel Issue |
Narrative:
Aircraft self-reported a series of faults. The leading fault appears to have been right 2 autotransformer rectifier. This fault drove several systems faults. The most significant being the failure/load shedding of the right-center tank pump. While reviewing the various system display pages EICAS generated a checklist due to the shed right-center tank pump being inoperative. We performed the checklist; which resulted in the right pump being manually turned off; and the crossfeed valve being manually commanded to the open position. With checklist items complete and all indications showing proper back-up operation; we continued. However; the fuel system failed to feed equally to both engines. Crossfeed valve synoptic displayed open; but no fuel was being cross-fed. With fuel balance/feeding not occurring as planned; we called dispatch; maintenance control and requested a conference call with the B787 fleet manager.with no viable solution to rectify the fuel imbalance; we proceeded to divert. Flight attendants were kept in the loop as we worked through the fuel issue so there was no surprise when it came down to the actual diversion. Per our conversation with dispatch; maintenance control and the fleet manager; we performed a routine overweight landing. The aircraft had already self-generated various logbook discrepancies. After parking and debriefing; we added the overweight landing discrepancy to the logbook.
Original NASA ASRS Text
Title: B787 Captain reported that an Autotransformer Rectifier failed subsequently causing a fuel imbalance. Crew decided to divert.
Narrative: Aircraft self-reported a series of faults. The leading fault appears to have been RIGHT 2 AUTOTRANSFORMER RECTIFIER. This fault drove several systems faults. The most significant being the failure/load shedding of the right-center tank pump. While reviewing the various system display pages EICAS generated a checklist due to the shed right-center tank pump being inoperative. We performed the checklist; which resulted in the right pump being manually turned off; and the crossfeed valve being manually commanded to the open position. With checklist items complete and all indications showing proper back-up operation; we continued. However; the fuel system failed to feed equally to both engines. Crossfeed valve synoptic displayed open; but no fuel was being cross-fed. With fuel balance/feeding not occurring as planned; we called dispatch; Maintenance Control and requested a conference call with the B787 fleet manager.With no viable solution to rectify the fuel imbalance; we proceeded to divert. Flight attendants were kept in the loop as we worked through the fuel issue so there was no surprise when it came down to the actual diversion. Per our conversation with dispatch; Maintenance Control and the fleet manager; we performed a routine overweight landing. The aircraft had already self-generated various logbook discrepancies. After parking and debriefing; we added the overweight landing discrepancy to the logbook.
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.