# SDR ASAA2012100993094

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 9, 2012
- Submitted: October 11, 2012
- Operation: Air carrier
- Aircraft: [N531AS](https://openairdocs.org/aircraft/N531AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35199
- Aircraft time: 9,497 hours, 2,997 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Regulator
- Part number: 1074847
- Part serial: 11870
- Condition: Inoperative
- Location: Nr 1 Engine
- Part time: 9,497 hours, 2,997 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/ASAA2012100993094

## Discrepancy

AFTER START UP,  DUCT PRESSURE SPLIT OF APPROXIMATELY 12 PSI LT 8- RT 20.  ACCOMPLISHED FAULT ISOLATION PROCEDURES TASK 36-10 TASK 804. TROUBLESHOT TO HIGH STAGE REGULATOR.  R & R IAW TASK 36-11-07, OPS NORMAL.

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