EMB-505 / Phenom 300
Flight Crew Instrument; Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP)
Aircraft Equipment Problem Critical
Air Traffic Control Provided Assistance; Flight Crew Overcame Equipment Problem; Flight Crew Took Evasive Action; Flight Crew Requested ATC Assistance / Clarification
Aircraft
In cruise at FL410 dual duct overtemp CAS messages displayed. Ran QRC; donned Oxygen; and began descent to 10;000 ft. Passenger masks deployed at around 25;000 ft. airplane altitude and 15;000 ft. cabin. [Requested priority handling] for immediate descent and diversion. Divert to ZZZ; uneventful landing.
Climbing between FL400 & FL410; we experienced a Duct 1 Over TEMP CAS MSG. Within about a minute we received a Duct 2 Over TEMP CAS MSG. We ran the QRH for a DUAL Duct Over Temp procedure and complied with it. We requested and began a descent to FL370 while running the procedure (which included a 1 minute timing after turning off to see if CAS MSGs cleared). Unable to clear; we needed to turn off bleeds and requested lower altitude as we were now slowly depressurizing the cabin. We [requested priority handling] to get lower. Descended to 10;000 ft.; dumped the cabin and removed our Oxygen masks. We landed uneventfully in VMC weather at ZZZ.
EMB-505 flight crew reported a pressurization problem that resulted in a diversion.