# SDR AALA202505231001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 22, 2025
- Submitted: May 23, 2025
- Operation: Air carrier
- Aircraft: [N473AN](https://openairdocs.org/aircraft/N473AN), registered now
- Make and model: Airbus A321-253NX
- Registry model: [Airbus A321-253NX](https://openairdocs.org/model/airbus-a321-253nx) (OpenAirDocs)
- Aircraft serial: 12291
- Aircraft time: 632 hours, 179 cycles
- System (JASC): [2611 · Smoke Detection](https://openairdocs.org/jasc/2611)
- Part: Filter
- Condition: Clogged
- Location: Smoke Detector
- Stage of operation: CL
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202505231001

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: LEFT AFT LAVATORY SMOKE DETECTOR PRESENTED 2 FALSE WARNINGS OF 1-2 SECOND DURATION DURING CLIMB AND CRUISE. MAINTENANCE FOUND SMOKE DETECTOR FILTER CLOGGED, CLEANED FILTER AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 26-12-00.

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