# SDR SWAA2015112446383

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 20, 2015
- Submitted: November 24, 2015
- Operation: Air carrier
- Aircraft: [N257WN](https://openairdocs.org/aircraft/N257WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 32515
- Aircraft time: 32,993 hours, 19,401 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Control Valve
- Part number: 32895625
- Part serial: 5326
- Condition: Failed
- Location: Bleed Air Sys
- Stage of operation: UK
- How discovered: O
- Nature of condition: J, B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2015112446383

## Discrepancy

DIVERT & DECLARED EMER.  AT FL 370 CABIN STOP PRESSURIZING, THE CABIN ALTITUDE LIGHT & HORN CAME ON.  THERE WAS NO RAPID DEPRESSURIZATION, CABIN BECAME WARM & STARTED TO SMELL AN ODOR.  ENG PARAMETERS & FLIGHT CONTROLS WERE NORMAL.  R & R PRE-COOLER CONTROL VLV IAW AMM.

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