Citationjet (C525/C526) - CJ I / II / III / IV
Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Flight Instructor
Flight Crew Total 2650; Flight Crew Type 480
Troubleshooting
Aircraft Equipment Problem Critical; Deviation - Altitude Excursion From Assigned Altitude; Deviation / Discrepancy - Procedural Clearance
Air Traffic Control Provided Assistance; Flight Crew Overcame Equipment Problem; Flight Crew Requested ATC Assistance / Clarification; Flight Crew Took Evasive Action; General Flight Cancelled / Delayed; General Maintenance Action
Aircraft
Level at FL400 and given lower altitudes to descend to on the ZZZZZ4 arrival into ZZZ and given to cross ZZZZZ at 14;000 feet. While descending through 36;000 feet; the cabin altitude reached 10;000 feet and increasing. Airplane Master Warning came on with CAB ALT annunciator on the annunciator panel. Crew quickly donned oxygen mask and requested for a rapid descent to 10;000 feet for pressurization issues. ATC gave clearance to descent to 10;000 feet. As aircraft arrived to 10;000 feet and below; annunciator for CAB ALT went out and cabin altitude reflects current altitude. Continued visual to landing at ZZZ Runway XXL without further events.
CE-525 pilot reported a Cabin Alt warning resulting in a rapid descent and precautionary landing at destination airport.