# SDR ASAA2023010341384

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 3, 2023
- Submitted: January 4, 2023
- Operation: Air carrier
- Aircraft: [N453AS](https://openairdocs.org/aircraft/N453AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36354
- Aircraft time: 33,832 hours, 10,653 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Regulator
- Part number: 1074847
- Part serial: 9295
- Condition: Inoperative
- Location: Nr 1 Engine
- Part time: 53,187 hours, 17,117 cycles
- Stage of operation: NR
- How discovered: 9
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023010341384

## Discrepancy

#1 ENG HIGH STAGE REGULATOR INOP. GROUNDED - YES. REPLACED #1 ENG HIGH STAGE REGULATOR , OPS LEAK CHECK OK. REF B737-900 AMM 36-11-07-400-801.

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