# SDR ASAA2022081639541

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 16, 2022
- Submitted: August 18, 2022
- Operation: Air carrier
- Aircraft: [N928AK](https://openairdocs.org/aircraft/N928AK), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 44099
- Aircraft time: 1,743 hours, 520 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Pressure Valve
- Part number: 632160643
- Part serial: 2501
- Condition: Faulted
- Location: #2 Engine
- Part time: 1,735 hours, 515 cycles
- Stage of operation: CL
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2022081639541

## Discrepancy

ON CLIMB OUT FROM SPOKANE, THE RIGHT BLEED AIR DUCT INDICATED 64 PSI. THE LEFT INDICATED 45 PSI. BOTH ENGINES PRODUCING 89.7% N1. IN CRUISE FLIGHT BOTH BLEED AIR DUCTS INDICATED 35PSI. GROUNDED - YES. REMOVED AND REPLACED #2 ENG PRSOV REF B737-9 AMM 36-11-04.

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