B767 Undifferentiated or Other Model
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Less Severe; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance
Air Traffic Control Provided Assistance; Air Traffic Control Issued New Clearance; Aircraft Equipment Problem Dissipated; Flight Crew Became Reoriented; Flight Crew Requested ATC Assistance / Clarification; Flight Crew Overcame Equipment Problem
Aircraft
Cleared for takeoff on the RNAV SID. The initial climb out; after contacting departure; ATC asked if we were flying the departure procedure. As I replied yes; I quickly realized we had lost our fixes on the legs page and had failed to complete the SID turn at 540 ft. I immediately advised that we were unable RNAV and requested a vector. They gave us a heading. Eventually they asked if we could proceed direct to fixes on the SID. After unsuccessfully attempting to enter any fixes on the legs page; both FMC's displayed 'Standby; Reset' message. After a few minutes; the message went away and I was able to change FMC pages and saw that the route page had dropped out. After entering the data back into the Route Page; we were able to navigate via the SID. Advised ATC that our FMC navigation was back up and we were able to proceed. No further issues. Upon landing at destination; advised Maintenance and on-duty tech about our write up as to the route dropping from FMC's after takeoff.
[Report narrative contained no additional information.]
Air carrier flight crew reported a temporary dual FMS failure on departure.