Narrative:

While in cruise; enroute from ZZZ1 to ZZZ2; at 41;000 ft. The duct 1 overtemp cas (crew alerting system) illuminated. I elected to continue to fly the plane as PF/PIC (pilot flying/pilot in command) and asked the pm/sioe to run the QRH (quick reference handbook) procedure. We initiated a descent to 36;000 ft. As per the QRH. The single passenger we had on board came up and was unhappy with his temp control. I explained the situation to him. That it was being caused by the duct overtemp and at this time we would be continuing to ZZZ2 but there was a chance if the duct did not cool we would have to divert. I assured him everything was safe at this time and I would let him know what we ended up with. No sooner had the passenger returned to his seat that the duct 2 overtemp cas illuminated. At that time we switched gears from the single duct overtemp QRH to the dual duct overtemp QRH procedure. We immediately requested 10;000 ft. From ATC (air traffic control) and mentioned we were having pressurization issues. They began giving us incremental descent instructions. At that point we [requested priority handling] to expedite the descent. We were then given a heading and approval to descend to 10;000 ft. Looking at the flight map I saw ZZZ was 70 miles in front of us. Knowing we had to complete the QRH procedure and take care of the briefings for a diversionary airport we elected to divert there as the timing would work great. We told ATC and they gave us direct ZZZ. We reached 10;000 ft. And asked for lower and were given 6;000 ft. At 6;000 ft. We removed our oxygen masks. I looked back to check on the passenger and he came up to me (seatbelt sign was on). I gave him a test briefing and he was upset about the diversion. At 6;000 ft. I checked the ecs (environmental control system) page and noted both ducts were now cooled and other than being depressurized we had no other issues. We elected to cancel our emergency status with ATC. We continued to ZZZ; landed and taxied in.

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Original NASA ASRS Text

Title: Flight Crew flying EMB-505 aircraft encountered pressurization problems in cruise.

Narrative: While in cruise; enroute from ZZZ1 to ZZZ2; at 41;000 ft. the DUCT 1 OVERTEMP CAS (Crew Alerting System) illuminated. I elected to continue to fly the plane as PF/PIC (Pilot Flying/Pilot In Command) and asked the PM/SIOE to run the QRH (Quick Reference Handbook) procedure. We initiated a descent to 36;000 ft. as per the QRH. The single passenger we had on board came up and was unhappy with his temp control. I explained the situation to him. That it was being caused by the Duct Overtemp and at this time we would be continuing to ZZZ2 but there was a chance if the duct did not cool we would have to divert. I assured him everything was safe at this time and I would let him know what we ended up with. No sooner had the passenger returned to his seat that the DUCT 2 OVERTEMP CAS illuminated. At that time we switched gears from the single duct OVERTEMP QRH to the DUAL DUCT OVERTEMP QRH procedure. We immediately requested 10;000 ft. from ATC (Air Traffic Control) and mentioned we were having pressurization issues. They began giving us incremental descent instructions. At that point we [requested priority handling] to expedite the descent. We were then given a heading and approval to descend to 10;000 ft. Looking at the flight map I saw ZZZ was 70 miles in front of us. Knowing we had to complete the QRH procedure and take care of the briefings for a diversionary airport we elected to divert there as the timing would work great. We told ATC and they gave us direct ZZZ. We reached 10;000 ft. and asked for lower and were given 6;000 ft. At 6;000 ft. we removed our oxygen masks. I looked back to check on the passenger and he came up to me (seatbelt sign was on). I gave him a test briefing and he was upset about the diversion. At 6;000 ft. I checked the ECS (Environmental Control System) page and noted both ducts were now cooled and other than being depressurized we had no other issues. We elected to cancel our emergency status with ATC. We continued to ZZZ; landed and taxied in.

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.