# SDR ASAA2022051238269

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 12, 2022
- Submitted: May 13, 2022
- Operation: Air carrier
- Aircraft: [N531AS](https://openairdocs.org/aircraft/N531AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35199
- Aircraft time: 42,294 hours, 12,243 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Regulator
- Part number: 1074847
- Part serial: 5420
- Condition: Failed
- Location: #1 Engine
- Part time: 62,751 hours, 30,388 cycles
- 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/ASAA2022051238269

## Discrepancy

REF ASA TASKCARD NG-36C-00001. #1 ENG HIGH STAGE VALVE FAILED REVERSE FLOW DIAGRAGHING SHEET. GROUNDED - YES. REMOVED #1 ENG HIGH STAGE REGULATOR REF B737-800 AMM 36-11-07. INSTALLED #1 ENG HIGH STAGE REG REF AMM 36-11-07. LK AND OPS CHECK GOOD.

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