# SDR AALA202104229023

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 19, 2021
- Submitted: April 23, 2021
- Operation: Air carrier
- Aircraft: [N927NN](https://openairdocs.org/aircraft/N927NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 31171
- Aircraft time: 23,791 hours, 9,906 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Valve
- Part number: 32895627
- Part serial: 6583
- Condition: Faulted
- Location: Lt Engine
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202104229023

## Discrepancy

AIRCRAFT WAS GROUNDED: LH BLEED TRIP OFF DURING CLIMB AND WOULD NOT RESET, DUCT PRESSURE REMAINED AT 8 PSI FOR RETURN TO MIA. REPLACED LH ENG HI STAGE VALVE (AALA202104229022) IAW AMM 36-11-06 AND PRECOOLER VALVE IAW AMM 36-12-02, OPS CHECK GOOD.

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