A B747 engine 1 oil press EICAS alerted at cruise and following qhr completion was shutdown. During ...

Narrative:

Approximately 2 hours into flight; at cruise altitude; crew received an engine 1 oil press EICAS. Executed the engine 1 oil press checklist. Oil pressure indication was below red line limit; therefore engine was shutdown in accordance with checklist. [ATC was advised]; company was contacted and crew was directed to return to departure airfield. After turning around; permission was granted by ATC to dump fuel. Approximately 110K of fuel was dumped. Executed VOR approach as ILS was unavailable. Descent; approach and landing were normal for situation.the aircraft had the identical problem the previous night with the result of the flight being very similar. The aircraft was released for flight; but obviously the previous problem was not properly corrected. In training; whenever we simulate dumping large amounts of fuel; the simulator is almost always returned with a lesser fuel load that is properly balanced. In reality; after dumping a large amount of fuel; the fuel ends up considerably out of balance. Perhaps ideas to deal with or mitigate this issue could be discussed in future training periods.

Original NASA ASRS Text

Title: A B747 ENG 1 OIL PRESS EICAS alerted at cruise and following QHR completion was shutdown. During fuel dumping; the crew noted that unlike the simulator; the actual aircraft fuel does not remain balanced. The flight returned to the departure airport.

Narrative: Approximately 2 hours into flight; at cruise altitude; crew received an ENG 1 OIL PRESS EICAS. Executed the ENG 1 OIL PRESS Checklist. Oil Pressure Indication was below red line limit; therefore engine was shutdown in accordance with checklist. [ATC was advised]; company was contacted and crew was directed to return to departure airfield. After turning around; permission was granted by ATC to dump fuel. Approximately 110K of fuel was dumped. Executed VOR approach as ILS was unavailable. Descent; approach and landing were normal for situation.The aircraft had the identical problem the previous night with the result of the flight being very similar. The aircraft was released for flight; but obviously the previous problem was not properly corrected. In training; whenever we simulate dumping large amounts of fuel; the simulator is almost always returned with a lesser fuel load that is properly balanced. In reality; after dumping a large amount of fuel; the fuel ends up considerably out of balance. Perhaps ideas to deal with or mitigate this issue could be discussed in future training periods.

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.

Attributes
ACN	1385604
Time
Date	201608
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZZ.ARTCC
State Reference	FO
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	B747 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	Powerplant Lubrication System
Person 1
Function	Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 150 Flight Crew Total 10000 Flight Crew Type 150
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Weight And Balance Inflight Event / Encounter Fuel Issue

A B747 engine 1 oil press EICAS alerted at cruise and following qhr completion was shutdown. During fuel dumping; the crew noted that unlike the simulator; the actual aircraft fuel does not remain balanced. The flight returned to the departure airport.