# SDR ASAA2016022415661

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 24, 2016
- Submitted: February 26, 2016
- Operation: Air carrier
- Aircraft: [N588AS](https://openairdocs.org/aircraft/N588AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35685
- Aircraft time: 31,785 hours, 9,668 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Shutoff Valve
- Part number: 1074926
- Part serial: 10148
- Condition: Failed
- Location: Nr 1 Engine
- Part time: 29,673 hours, 11,105 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2016022415661

## Discrepancy

ON TAXI OUT, LT DUCT PRESSURE INDICATED ZERO.  ACFT GROUNDED. REPLACED PRSOV REF AMM 36-11-04-400-801.  REPLACED 450 THERMOSTAT REF AMM 36-11-05-400-801.  NO HELP.  REPLACED BLEED AIR REGULATOR, REF AMM 36-11-03-400-801. OPS CHECK NORMAL. GROUND VERIFICATION SUCCESSFUL BY ENGINE RUN.

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