# SDR AALA202603267233

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 26, 2026
- Submitted: March 26, 2026
- Operation: Air carrier
- Aircraft: [N165US](https://openairdocs.org/aircraft/N165US), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 1431
- Aircraft time: 79,139 hours, 30,848 cycles
- System (JASC): [2611 · Smoke Detection](https://openairdocs.org/jasc/2611)
- Part: Smoke Detector
- Condition: False Activation
- 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/AALA202603267233

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: SMOKE LAVATORY SMOKE POSTED INFLIGHT. THE FLIGHT CREW REPORTED THE DETECTION WAS 3L DOOR BUT COULD NOT CONFIRM THE SOURCE SINCE IT ONLY POSTED 4-5 SECONDS THEN EXTINGUISHED. MAINTENANCE PERFORMED OPERATIONAL CHECK OF LAVATORY L SMOKE DETECTION SYSTEM PER AMM 26-17-00 WITH NO ISSUES OR FAULTS NOTED.

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