# SDR DXTA2025071104184

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 9, 2025
- Submitted: July 11, 2025
- Operation: Air carrier
- Aircraft: [N337QS](https://openairdocs.org/aircraft/N337QS), registered now
- Make and model: Emb EMB-505
- Registry model: [EMB EMB-505](https://openairdocs.org/model/embraer-executive-emb-505) (OpenAirDocs)
- Aircraft serial: 50500202
- Aircraft time: 9,846 hours, 7,817 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Control Valve
- Part number: 130025011
- Part serial: 1084
- Condition: Defective
- Location: Ecs
- 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/DXTA2025071104184

## Discrepancy

APPROX. 5 MINUTES AFTER FINISHING ECS 2 VALVE FAIL QRH, A GRADUAL LOSS OF CABIN PRESSURIZATION STARTED. CABIN ALTITUDE WAS ROUGHLY 3000FT. ROUGHLY 2-3000FPM CLIMB IN THE LOSS OF PRESSURIZATION, RATE READING WAS IN THE RED.  THIS OCCURED WHILE AT 280+KTS, ROUGHLY AROUND 29,000FT.  WE WERE ABLE TO DESCEND RAPIDLY TO 10,000FT. ONCE LEVEL AT 10,000FT, CABIN ALTITUDE EQUALED 10,000FT, MASK DID NOT DEPLOY.  CABIN DELTA P AT 10,000FT WAS 0.0, CAB ALTITUDE HI CAS CAME ON, WE CONTINUED A DECENT BELOW 10,000FT, ACCOMPLISHED QRH PROCEDURE. CORRECTIVE ACTION; REPLACED THE RH FCSOV AND COMPLIED WITH OPS AND LEAK CHECKS WITH NO FAULTS. WORK DONE WITH REFERENCE TO EMB505 AMM 21-21-01.

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