# SDR ASAA2021022834211

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 28, 2021
- Submitted: March 2, 2021
- Operation: Air carrier
- Aircraft: [N581AS](https://openairdocs.org/aircraft/N581AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35188
- Aircraft time: 49,081 hours, 14,635 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Regulator
- Part number: 1074847
- Part serial: 6947
- Condition: Failed
- Location: #1 Eng High Stg
- Part time: 55,126 hours, 19,361 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/ASAA2021022834211

## Discrepancy

PERFORMED TASK CARD NG-36WC-00001 PROCEDURE (L) HIGH STAGE REGULATOR FAILED ON #1 ENGINE. GROUNDED - YES. REMOVED AND REPLACED HIGH STAGE REGULATOR ON #1 ENGINE REF B737-800 AMM 36-11-07, NO LEAKS DETECTED.

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