# SDR DL76L090971

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 31, 2009
- Submitted: June 12, 2009
- Operation: Air carrier
- Aircraft: [N199DN](https://openairdocs.org/aircraft/N199DN), registered now
- Make and model: Boeing 767332
- Aircraft serial: 28456
- Aircraft time: 53,643 hours, 7,767 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Isolation Valve
- Condition: Stuck
- Location: Left
- Stage of operation: TX
- How discovered: O
- Nature of condition: O
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DL76L090971

## Discrepancy

LT ISOLATION VALVE STUCK IN OPEN POSITION.  REMOVED AND REPLACED ISOLATION VALVE PER M/M, OPS CHECK VLV.

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