Citation Excel (C560XL)
Flight Crew Air Transport Pilot (ATP)
Confusion; Distraction; Human-Machine Interface; Troubleshooting; Workload
Aircraft Equipment Problem Critical
Air Traffic Control Provided Assistance; Flight Crew Diverted; Flight Crew Requested ATC Assistance / Clarification; Flight Crew Landed in Emergency Condition; General Declared Emergency
Aircraft; Weather
While enroute [the] PICs PFD; MFD; TCAS; Autopilot; yaw damper; ground Prox; and FMS failed. Crew ran checklist for an IAC [Integrated Avionics Computer] failure; and [the recovery] of instruments [was] successful. With no autopilot; yaw damper; flight director and FMS available; and with the lack of knowledge of why the IAC would fail; crew declared an emergency and requested vectors to...the nearest suitable airport with VFR conditions while most of the region was covered with thick clouds; low ceilings and rain. Descent; approach; landing and roll out were executed with no further issues.
When multiple avionics and instrument displays failed the flight crew of a C560XL declared an emergency and ATC provided vectors and assistance to a safe landing at the nearest suitable airport.