# SDR MYWA120017

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 4, 2012
- Submitted: February 10, 2012
- Operation: Air carrier
- Aircraft: [N742MA](https://openairdocs.org/aircraft/N742MA), registered now
- Make and model: Boeing 737-8Q8
- Registry model: [Boeing 737-8Q8](https://openairdocs.org/model/boeing-737-8q8) (OpenAirDocs)
- Aircraft serial: 30675
- Aircraft time: 27,774 hours, 11,423 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Valve
- Condition: Stuck
- Location: Bleed Air Sys
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/MYWA120017

## Discrepancy

ETOPS SIGNIFICANT SYSTEM:  ON WALKAROUND, WITH APU BLEED ON, LOUD AIR NOISE COMING FROM NR 2 ENGINE INTERNAL.  T/S AND FOUND HIGH STAGE VALVE STUCK OPEN, REMOVED HSV AS PER AMM 36-11-03.  INSTALLED HIGH STAGE VALVE ON NR 2 ENGINE IAW B737-800 M/M 36-11-06, OPS CHECK NORMAL.

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