Boeing Company Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 250; Flight Crew Total 25000; Flight Crew Type 7000
Aircraft Equipment Problem Critical
Flight Crew Overcame Equipment Problem; General Maintenance Action
Aircraft; Procedure
This aircraft lost both FMCs 3 times. This was written up inbound. When the aircraft arrived in ZZZZ (Asia) the bad FMC was just signed off as a reset; ops check good. We picked up this aircraft and approaching the West Coast of America; lost both FMCs. I was woken up from break and I found one First Officer hand flying the aircraft and the other First Officer with the book out trying to solve the problem. I was informed that the book did not address the problem (as was also written up previously) without the book; I selected the FMC master to the right position and got a blue line. I activated the route. Then the First Officer cleaned up the route and performance numbers. We selected the left Captain's selector to FMC right. The First Officer notified the Center that we had lost all navigation; but it was now operable on one FMC. We had not drifted off course; so there were no further problems. Called Dispatch and notified him. He entered the write up and I asked him to make sure this is repaired. This could have been a tragedy if it happened on approach in minimum weather; or it could have caused a navigation deviation across the ocean. The write ups have to be fixed in ZZZZ and tell them to stop just signing things off. They appear to be very intimidated to not cause any delay or cost to the company.
A Captain reported accepting an aircraft that had been written up on the inbound flight for three dual FMC failures. The discrepancies are signed off by Maintenance as reset FMCs. The problem appears again over the North Pacific on the return flight.