# SDR AALA201908059027

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 4, 2019
- Submitted: August 5, 2019
- Operation: Air carrier
- Aircraft: [N549UW](https://openairdocs.org/aircraft/N549UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 4932
- Aircraft time: 27,301 hours, 10,144 cycles
- System (JASC): [2611 · Smoke Detection](https://openairdocs.org/jasc/2611)
- Part: Filter
- Condition: Dirty
- Location: Smoke Detector
- Stage of operation: NR
- 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/AALA201908059027

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: LAVATORY 3L SMOKE DETECTOR ACTIVATED TWICE IN FLIGHT. NO ONE IN LAVATORY THE SECOND TIME. MAINTENANCE PERFORMED BITE TEST OF THE SMOKE DETECTION AMM 26-10-00-740-810-A. MAINTENANCE ALSO FOUND BAD FILTER CONDITION OF 3L SMOKE DETECTION SYSTEM AND RERPLACED BAD FILTER IAW AMM 26-17-15.

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