Narrative:

At 5:15 hours into flight; pilot flying; relief pilot in captain seat in cruise at FL340 a fuel system pressure caution sounded and displayed on the EICAS accompanied by illumination of the amber light in the left aft fuel pump switch on the overhead fuel system control panel. The first officer and I immediately determined that the aircraft was flying normally with no adverse engine or flight management issues. I monitored the aircraft while the first officer referenced the appropriate checklist in the QRH and directed the purser to have the captain return to the flight deck. With the captain in command; we determined that the flight manual directed a landing at the nearest suitable airport because both a/C fuel pumps in the left main system were now indicating inoperative --the left forward fuel pump was properly deferred and rendered inoperative prior to our departure. The captain consulted with dispatch and maintenance via satcom and we all concurred a diversion to ZZZZ; was the appropriate course of action. The captain then briefed the purser and the passengers as to our intentions. With the completion of the diversion checklist and direction from air traffic control; an uneventful descent; approach and heavyweight landing were accomplished by the captain. The fuel system malfunction; overweight landing and some unrelated cabin discrepancies were properly communicated to maintenance before we deplaned. The captain then directed me and the other first officer to assist him in coordinating for and confirming that all passengers and crew were properly cleared by authorities; fed and quartered. We departed the next day in a different 767 and completed the trip.

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Original NASA ASRS Text

Title: B767 flight crew experiences the failure of a left wing tank fuel pump after being dispatched with the left forward pump on MEL; leaving the left engine to suction (and gravity) feed. Company procedures required diversion to the nearest suitable airport for maintenance.

Narrative: At 5:15 hours into flight; pilot flying; Relief Pilot in Captain seat in cruise at FL340 a Fuel SYS Pressure caution sounded and displayed on the EICAS accompanied by illumination of the amber light in the Left Aft Fuel Pump switch on the overhead fuel system control panel. The First Officer and I immediately determined that the aircraft was flying normally with no adverse engine or flight management issues. I monitored the aircraft while the First Officer referenced the appropriate checklist in the QRH and directed the purser to have the Captain return to the flight deck. With the Captain in command; we determined that the flight manual directed a landing at the nearest suitable airport because both A/C Fuel Pumps in the left main system were now indicating inoperative --the Left Forward Fuel Pump was properly deferred and rendered inoperative prior to our departure. The Captain consulted with Dispatch and Maintenance via SATCOM and we all concurred a diversion to ZZZZ; was the appropriate course of action. The Captain then briefed the purser and the passengers as to our intentions. With the completion of the Diversion Checklist and direction from Air Traffic Control; an uneventful descent; approach and heavyweight landing were accomplished by the Captain. The fuel system malfunction; overweight landing and some unrelated cabin discrepancies were properly communicated to Maintenance before we deplaned. The Captain then directed me and the other First Officer to assist him in coordinating for and confirming that all passengers and crew were properly cleared by authorities; fed and quartered. We departed the next day in a different 767 and completed the trip.

Data retrieved from NASA's ASRS site as of July 2013 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.