# SDR DALA2017053104522

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 30, 2017
- Submitted: June 7, 2017
- Operation: Air carrier
- Aircraft: [N819DX](https://openairdocs.org/aircraft/N819DX), registered now
- Make and model: Boeing 757-26D
- Registry model: [Boeing 757-26D](https://openairdocs.org/model/boeing-757-26d) (OpenAirDocs)
- Aircraft serial: 33959
- Aircraft time: 31,909 hours, 17,553 cycles
- System (JASC): [3830 · Waste Disposal System](https://openairdocs.org/jasc/3830)
- Part: Check Valve
- Condition: Corroded
- Location: Waste Tank
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DALA2017053104522

## Discrepancy

FWD AND AFT VAC WASTE TANK CHECK VALVES HAVE CORROSION ON INNER SURFACE. REMOVED AND REPLACED FWD AND AFT VACUUM WASTE TANK CHECK VALVE ASSY'S PER MM 38-32-36. NO DEFECTS NOTED.

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