Challenger CL604
Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Less Severe; Deviation - Speed All Types; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Overcame Equipment Problem
Aircraft
We were climbing from FL390 to FL410 and around FL405 we got an EFIS COMP MON warning accompanied with IAS and erroneous altitude on the Captain's side. I called for the checklist and the action led us to troubleshoot and determine the failed instruments. We found that the ADC 1 was failed; and switched the ADC to 2. The system detected an overspeed; however; seeing the power setting; we determined it was an erroneous indication. The indication led to the clacker continuing for the entirety of being at the altitude. I chose to stay at FL410 because we were on top of the clouds and could see the horizon. Also; with the erroneous overspeed indication; we had a Mach Trim fail and CAS Miscomp alert. We advised ATC we are unable RVSM; emailed the company and asked if we should divert to TEB; and as we descended; (as the plane got warmer) the clacker went away; the Mach trim was able to be engaged; and the Captain's ADC 1 was working normally. I suspect it was due to ice in the static system.
[Report narrative contained no additional information.]
CL-604 flight crew reported inflight failure of Air Data Computer 1; suspected cause was ice in the static system.