Cessna Citation Sovereign (C680)
Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 50; Flight Crew Total 6500; Flight Crew Type 300
Troubleshooting; Time Pressure; Confusion; Human-Machine Interface
Aircraft Equipment Problem Less Severe; Deviation - Track / Heading All Types
Flight Crew Overcame Equipment Problem
Aircraft; Equipment / Tooling
The Honeywell EPIC is strange and difficult to understand. We were given direct to a fix. Put that fix in knowing that as the next (fly TO) fix in the FMS flight plan; the FMS would not go direct even though we pressed to direct key. In this situation it draws a line between your last fix and the TO fix and intercepts that line. It does not go direct to the fix you'd like. So after putting in the direct fix; we pressed direct TO the new fix 3 times before the plane flew direct to the new fix.PLEASE CHECK YOUR DATABASE FOR ALL THE PROBLEMS PEOPLE ARE HAVING WITH THE HONEYWELL PRIMUS EPIC (C680; FALCON 2000; GULFSTREAM 450/550).
[Report contains no additional information.]
A CE680 pilot described the difficulty activating a Honeywell Primus EPIC FMC DIRECT TO function after several DIRECT TO function button pushs were made.