# SDR ASAA2017050420665

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 4, 2017
- Submitted: May 8, 2017
- Operation: Air carrier
- Aircraft: [N566AS](https://openairdocs.org/aircraft/N566AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35182
- Aircraft time: 39,560 hours, 11,846 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Check Valve
- Part number: 32022221
- Part serial: 10450
- Condition: Failed
- Location: Nr 2 Engine
- Part time: 39,562 hours, 11,847 cycles
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017050420665

## Discrepancy

PER EA 800-71EA-18794 STEP 21 REQUIRES THE NR  2 ENGINE 5TH STAGE CHECK VALVE.  ACFT GROUNDED. REMOVED AND REPLACED THE NR 2 ENGINE 5TH STAGE CHECK VALVE IAW AMM 36-11-02. LEAK CHECKED GOOD.

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