B777-200
Flight Crew Air Transport Pilot (ATP)
Distraction; Human-Machine Interface; Troubleshooting; Communication Breakdown
Aircraft Equipment Problem Critical; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Weather / Turbulence
Flight Crew Overcame Equipment Problem; Flight Crew Became Reoriented; Flight Crew Returned To Clearance
Aircraft
About 3:30 into flight at approximately N60/W30 we lost both autopilots and all FMS displays went blank. The ECL [Electronic Check List] for LANDING ELEVATION UNKNOWN appeared and we complied with this short checklist. This was NOT the problem. We got one autopilot working and both FMSs came back on so we reloaded the flight plan and [when complete] were a maximum of 5 NM to the right of course. We aggressively returned to course while we used SATCOM to call Maintenance Control and Operations. Maintenance advised they had already noted that we appeared to have lost our AIMS [integrated Airplane Information Management System] which controlled all/most of the lost items. I determined we were safely flying and navigating [well enough] to continue the mission. Gander SELCAL'd us and asked for a position report as one of the many things we lost was the CPDLC. We explained we were experiencing MINOR electrical problems and to please give us one minute to compile and provide the report.
This caused us to lose our magenta line on our Navigation Display (ND). We saw we initially had a loss of VNAV and LNAV flight director commands as the autopilot basically went to a pitch and power setting.We tried changing autopilots as well as changing our FMC control (from left to right); and this got us our magenta line up and running. We determined we got no more than 3.5 miles off course centerline while this took place; and there were no traffic conflicts near us. We continued on with the flight as we were now back with full navigational capability.
A B777-200 flight crew suffered the partial loss of one AMIS (Aircraft Management Information System) enroute over the Atlantic and a minor track deviation resulted before they could re-establish navigation and control functions.