# SDR AALA2020031869026

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 15, 2020
- Submitted: March 18, 2020
- Operation: Air carrier
- Aircraft: [N837NN](https://openairdocs.org/aircraft/N837NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 30908
- Aircraft time: 30,991 hours, 12,582 cycles
- System (JASC): [3830 · Waste Disposal System](https://openairdocs.org/jasc/3830)
- Part: Drain Valve
- Part number: 12D10212
- Condition: Clogged
- Location: Zone 200
- Stage of operation: CL
- How discovered: O
- Nature of condition: B
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA2020031869026

## Discrepancy

AIRCRAFT GROUNDED - AFTER TAKE-OFF, THROUGH CLIMBOUT TO CRUISE ALTITUDE (FL360), CREW REPORTED ROTTEN EGG SMELL THROUGHOUT CABIN.  ACCOMPLISHED MCM 05-96-70 SMOKE/ODOR/FUMES INITIAL TROUBLESHOOTING. FOUND L1 DOOR DRAIN VALVE CLOGGED.  REMOVED AND REPLACED GRAY WATER DRAIN VALVE PER AMM 38-31-02, OPERATIONAL AND LEAK CHECKS GOOD. NO ODOR SMELL NOTED. OKAY FOR  SERVICE.

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