# SDR AALA202608204842

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 19, 2026
- Submitted: August 21, 2026
- Operation: Air carrier
- Aircraft: [N856NN](https://openairdocs.org/aircraft/N856NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 31107
- Aircraft time: 46,955 hours, 20,326 cycles
- System (JASC): [3830 · Waste Disposal System](https://openairdocs.org/jasc/3830)
- Part: Sill Drain
- Condition: Clogged
- Location: Zone 800
- Stage of operation: DE
- How discovered: O
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202608204842

## Discrepancy

AIRCRAFT WAS GROUNDED: THE SMELL OF ROTTEN EGGS IN THE AFT GALLEY UNDER LOW POWER SETTINGS. THIS OCCURS ON THE GROUND AND IN THE AIR WITH LOW POWER SETTINGS WITH THE APU OFF, LEFT AND RIGHT PACKS IN AUTO, WITH ISOLATION VALVE IN AUTO. COULD NOT SMELL IN THE COCKPIT. MAINTENANCE FOUND SOURCE OF ODOR TO BE DOOR SILL DRAINS. UNCLOGGED DOOR SILL DRAINS IAW AMM 38-31-00.

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