# SDR AALA202609013848

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 30, 2026
- Submitted: September 1, 2026
- Operation: Air carrier
- Aircraft: [N174US](https://openairdocs.org/aircraft/N174US), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 1492
- Aircraft time: 81,121 hours, 31,662 cycles
- System (JASC): [2611 · Smoke Detection](https://openairdocs.org/jasc/2611)
- Part: Filter
- Condition: Dirty
- Location: Zone 900
- Stage of operation: CR
- 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/AALA202609013848

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: DURING CRUISE FLIGHT THE MID LAVATORY SMOKE ALARM AND ECAM WARNING ACTIVATED MOMENTARILY (LESS THEN FIVE SECONDS) AND THEN EXTINGUISHED. AFTER LAVATORY INSPECTION BY THE CABIN CREW NO SMOKE SOURCE WAS DETECTED. MAINTENANCE CLEANED AND REPLACED SMOKE DETECTOR FILTER IN MID LAV PER AMM 26-17-00. OPS TEST GOOD.

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