Gulfstream G200 (IAI 1126 Galaxy)
Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument
Flight Crew Last 90 Days 37; Flight Crew Total 2337; Flight Crew Type 37
Workload; Troubleshooting; Time Pressure; Situational Awareness; Human-Machine Interface; Distraction
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Provided Assistance; Flight Crew Requested ATC Assistance / Clarification; Flight Crew Overcame Equipment Problem; Flight Crew Landed in Emergency Condition; Flight Crew Diverted; Flight Crew FLC complied w / Automation / Advisory
Aircraft
[Received Priority].Crew was at cruise flight at Flight Level 410 from ZZZ to ZZZ1; both pilots were at controls when EMER BUS FAIL CAS message came up followed by a list of CAS (Crew Alerting System) messages. Autopilot was kicked off and Captain had to hand fly the aircraft. Depressurization of aircraft began; crew put on quick donning masks. Crew [advised ATC] and began running the appropriate QRH called for by Captain; EMER BUS FAIL. FO (First Officer) was able to complete the checklist for EMER BUS FAIL. Following QRH; by pressing the override EMER BUS switch to the right position EMER BUS regained power. All CAS messages went away except for CAS message override ALT EMER BUS. At that time Captain was able to get to a lower altitude to take oxygen masks off. FO continue working communications and Captain flew the aircraft. Crew diverted to the nearest suitable airport with no other incidents.
Corporate Jet First Officer reported during cruise flight the Emergency Electrical Bus failed. The pilot crew reconfigured the electrical system following the QRH procedures and diverted to the nearest suitable airport.