Falcon 50
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 60; Flight Crew Total 14910; Flight Crew Type 1900
Human-Machine Interface; Workload
Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Issued New Clearance; Flight Crew Became Reoriented; Flight Crew Returned To Clearance
Human Factors
We were flying the HYPER5 arrival landing at IAD.  Potomac instructed us to descend via the HYPER5 before arriving at MULRR.  The pilot flying had his FMS loaded for runway 1R; my FMS was loaded for 1C.  However; the pilot flying had not loaded the segment of the HYPER5 after MULRR properly in his FMS.  After crossing MULRR intersection; the pilot flying continued on his present heading without making the appropriate turn towards SIGBE intersection and descending via the RNAV arrival.  I noticed the problem and asked the pilot flying to start a turn while I corrected his FMS.  Too late!  Potomac noticed our deviation and began issuing headings and altitudes.We fly to IAD often but not using the HYPER5 arrival. The pilot flying did not digest the entire arrival and I missed the wrong sequence of navigation fixes on his FMS. We were very busy in the cockpit and lacked attention to detail. In the future we will take a larger view of the procedures earlier in the flight.
Falcon 50 First Officer reports a track deviation while flying the HYPER5 Arrival into IAD. The flying Captain's FMS was not properly programed to make the turn at MULRR to SIGBE resulting in vectors from PCT.