Fractional pilot crew reported the loss of the #1 AHRS which caused other multiple instrument failures.
Synopsis
Fractional pilot crew reported the loss of the #1 AHRS which caused other multiple instrument failures.
Narrative
During enroute climb we received a HDG (Heading) flag; followed by an unreliable attitude indication on PFD 1 (Primary Flight Display). Shortly after we lost AHRS 1 causing us to receive several CAS (Crew Alerting System) messages and degraded instrumentation. CAS messages; AHRS 1 FAIL; YD (Yaw Damper) FAIL AP (Autopilot) FAIL. We lost autopilot and followed the QRH Procedure to go into revisionary mode on the PFD 1 using AHRS2. In descent company informed ATC to ask us to divert to ZZZ. we felt safe with that request. As we divert we received the SWPS (Stall Warning and Protection System) Fault. We advised ATC due to the lack of stall protection in addition to our other issues.We received several flags; first one was heading flag followed by the AHRS 1 FAIL; AP FAIL; YD FAIL. Additionally we lost autopilot. Later in flight we received the Fault Cass informing us of that issue.I believe all the issues were resulting from the AHRS 1 failing.With PFD 1 unreliable I transferred the controls to the FO to hand fly. I proceeded to follow the QRH procedure for AHRS 1 fault; YD fail; we had a discussion and both felt it was safe to continue to ZZZ1 airport. I was able to get in contact with maintenance and they believed ZZZ1 was a good place to have ground support look at the airplane. as we are getting closer ATC infomred us company requested we divert to ZZZ1. after a brief discussion we felt that it was safe for us to comply. We then received our SWPS Fault and followed the QRH. We then both agreed that it would be appropriate to [advise ATC]. we continue hand flying the entire flight and landed without incident.With this being a MX (Maintenance) issue its hard to describe a way we can improve. I do believe that overall our aircraft our maintained to the highest standards.
Second reporter narrative
As we were climbing we experienced a HDG (Heading) flag. Next we noticed unreliable attitude indications on the PFD 1 (Primary Flight Display). Then we received the following CAS (Crew Alerting System) messages; AHRS 1 FAIL; AP (Autopilot) FAIL; YD (Yaw Damper) FAIL. Autopilot was turned off by the system. We hand flew the airplane and went through the QRH; which informed us to go into revisionary mode for PFD 1. During our descent the company had ATC ask us if we could divert from ZZZ2 to ZZZ1. We accepted the request as we felt we were in a safe condition to do so. Shortly after we had a SWPS (Stall Warning Protection System) FAULT CAS appear. We advised ATC since we wouldn't have any stall protection on top of the other CAS messages. HDG flag; AHRS 1 FAIL; AP FAIL and YD FAIL were the first CAS messages. From this; we lost autopilot. During descent we saw the SWPS FAULT CAS. AHRS 1 failure was the probable root cause.The PF transferred controls to me (PM) as he ran through the QRH for the AHRS 1 and YD messages. We hand flew the airplane once the AP Fail occurred. Once the QRH checklist was complete we decided we could continue to ZZZ2. Since I had the controls and radios; the PF made contact with maintenance; who told us ZZZ1 is better than returning to ZZZ for maintenance. ATC notified us that the company would like for us to go to ZZZ1; if possible. We decided to divert to ZZZ1 as we felt it could be done safely. A SWPS FAULT CAS appeared; which made us feel unsafe; resulting in us [advising ATC]. This was a maintenance problem; so we aren't too sure what the root cause of it was. We did a great job using CRM to balance the workload and land the plane without issues. AHRS FAILURE (1); no autopilot; no YD; stall warning protection fault.
Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.