# SDR CALA2026041715426

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 10, 2026
- Submitted: April 17, 2026
- Operation: Air carrier
- Aircraft: [N15710](https://openairdocs.org/aircraft/N15710), registered now
- Make and model: Boeing 737724
- Aircraft serial: 28780
- Aircraft time: 83,323 hours, 31,193 cycles
- System (JASC): [3800 · Water and Waste System](https://openairdocs.org/jasc/3800)
- Part: Drain
- Part number: 146A74024
- Condition: Corroded
- Location: Zone 100
- 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/CALA2026041715426

## Discrepancy

WASTE TANK DRAIN ENCLOSURE HAS CORROSION AT THE AFT ANGLE THAT ATTACHES TO THE SKIN AND UNDER THE STAINLESS STEEL RING AT THE DRAIN DUCT.  INSTALLED NEW PAN ASSY AT WASTE TANK DRAIN AS PER 51-40-02-0G-0 AND DRAWING 146A7400.

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