# SDR 2026F00063

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 20, 2026
- Submitted: April 2, 2026
- Operation: General aviation
- Aircraft: [N94HA](https://openairdocs.org/aircraft/N94HA), registered now
- Make and model: Amd FALCON2000EX
- Aircraft serial: 002
- Aircraft time: 7,148 hours, 3,823 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Regulator Valve
- Part number: RYLB531811
- Part serial: 77
- Condition: Closed
- Location: Aft Service Bay
- Part time: 7,148 hours, 3,823 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2026F00063

## Discrepancy

AT ABOUT FL 340 CLIMBING TO 350 WE HAD THE RED CABIN ALTITUDE WARNING LIGHT AND AURAL WARNING COME ON. WE IMMRDIATELY DONNED OUR OXYGEN MASKS AND CO PILOT STARTED THE CABIN ALTITUDE EMERGENCY CHECKLIST. ONCE CREW COMMUNICATION WAS ESTABLISHED WE SQUAWKED 7700 AND NOTIFIED ATC THAT WE WERE HAVING CABIN PRESSURIZATION ISSUES AND NEEDED TO DESCEND AND RETURN TO OUR DEPARTURE (HOME BASE) AIRPORT. DURING THE DESCENT WE WERE ABLE TO REESTABLISH PRESSURIZATION CONTROL THROUGH MANUAL MODES, APPROACH AND LANDING WERE MADE NOEMALLY WITHOUT INCIDENT.

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