# SDR MYWA110098

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 15, 2011
- Submitted: September 16, 2011
- Operation: Air carrier
- Aircraft: [N739MA](https://openairdocs.org/aircraft/N739MA), registered now
- Make and model: Boeing 737-8Q8
- Registry model: [Boeing 737-8Q8](https://openairdocs.org/model/boeing-737-8q8) (OpenAirDocs)
- Aircraft serial: 30670
- Aircraft time: 17,772 hours, 6,835 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Thermostat
- Condition: Defective
- Location: Bleed Air Sys
- Stage of operation: CL
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/MYWA110098

## Discrepancy

ETOPS SIGNIFICANT SYSTEM:  DUCT PRESSURE SPLIT 40 PSI SPLIT IN CLIMB (L 50/R10) PSI 26 PSI SPLIT IN CRUISE (L40/R14) PSI 20 PSI L AND R ON DESCENT.  ACCOMPLISHED ENGINE BLEED AIR SYSTEM HEALTH CHECK IAW B737-800 M/M 36-11-00 FOUND NR 2 ENGINE 450 DEGREE F THERMOSTAT AT FAULT REMOVED AND REPLACED NR 2 ENGINE 450 DEGREE F THERMOSTAT IAW B737-800 M/M 36-11-05, OPS CHECK NORMAL.

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