# SDR AALA202307318572

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 30, 2023
- Submitted: July 31, 2023
- Operation: Air carrier
- Aircraft: [N440AN](https://openairdocs.org/aircraft/N440AN), registered now
- Make and model: Airbus A321-253NX
- Registry model: [Airbus A321-253NX](https://openairdocs.org/model/airbus-a321-253nx) (OpenAirDocs)
- Aircraft serial: 10643
- Aircraft time: 6,827 hours, 1,829 cycles
- System (JASC): [2600 · Fire Protection System](https://openairdocs.org/jasc/2600)
- Part: Deu
- Part number: Z043H000351A
- Part serial: 043H00049031
- Condition: False Indication
- Location: Zone 100 - Fuse
- Part time: 6,827 hours, 1,829 cycles
- Stage of operation: CR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202307318572

## Discrepancy

AIRCRAFT WAS GROUNDED: AT CRUISE ALTITUDE ECAM:LAVATORY SMOKE - FORWARD LAVATORY WENT OFF 3 TIMES. NO SMOKE OR FIRE IN LAVATORY. MAINTENANCE REPLACED DECODER ENCODR UNIT B 300RHT (DEU) PER AMM 23-73-47 AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK.

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