# SDR UALA2012020800751

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 8, 2012
- Submitted: February 10, 2012
- Operation: Air carrier
- Aircraft: [N799UA](https://openairdocs.org/aircraft/N799UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26926
- Aircraft time: 61,285 hours, 8,855 cycles
- Engine: Pwa PW40903
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Check Valve
- Part number: S210W1101012
- Part serial: 660
- Condition: Faulty
- Location: Bleed Air Sys
- 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/UALA2012020800751

## Discrepancy

REF JOB CARD 2-2132.  FOUND NR 2 ENGINE LEFT INTERMEDIATE CHECK VALVE FAILS FLAPPER PLATE THICKNESS CHECK.  REPLACED THE NR 2 ENGINE INBD INTERMEDIATE PRESSURE CHECK VALVE IAW MM.

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