# SDR UALA2010100403657

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 3, 2010
- Submitted: October 8, 2010
- Operation: Air carrier
- Aircraft: [N204UA](https://openairdocs.org/aircraft/N204UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 28713
- Aircraft time: 52,637 hours, 7,502 cycles
- Engine: Pwa PW4090
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Check Valve
- Part number: S210W110102
- Part serial: 247
- Condition: Faulty
- Location: Nr 1 Engine
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2010100403657

## Discrepancy

NR1 ENGINE LT INTERMEDIATE PRESSURE CHECK VALVE FLAPPER END PLAY CLEARANCE IS MORE THAN .030.  REPLACED CHECK VALVE.  OPS NORMAL.

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