# SDR UALA2010122004639

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 19, 2010
- Submitted: December 20, 2010
- Operation: Air carrier
- Aircraft: [N212UA](https://openairdocs.org/aircraft/N212UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 30218
- Aircraft time: 37,830 hours, 8,292 cycles
- Engine: Pwa PW4084
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Isolation Valve
- Part number: 32907706
- Part serial: 1262C
- Condition: Faulty
- Location: Left
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2010122004639

## Discrepancy

LEFT ISOLATION VALVE CHECK FAILED TO SEAL.  MANIFOLD WOULD NOT DROP, STAYED ABOVE 20 PSI.  REPLACED LT ISOLATION VALVE IAW MM. OPS NORMAL.

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