Narrative:

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.

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Original NASA ASRS Text

Title: EMB-505 flight crew reported a pressurization problem that resulted in a diversion.

Narrative: 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.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.