# SDR AALA202508040260

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 3, 2025
- Submitted: August 4, 2025
- Operation: Air carrier
- Aircraft: [N958XV](https://openairdocs.org/aircraft/N958XV), registered now
- Make and model: Airbus A321-253N
- Registry model: [Airbus A321-253N](https://openairdocs.org/model/airbus-a321-253n) (OpenAirDocs)
- Aircraft serial: 8819
- Aircraft time: 17,792 hours, 4,757 cycles
- System (JASC): [2611 · Smoke Detection](https://openairdocs.org/jasc/2611)
- Part: Smoke Detector
- Condition: False Activation
- Location: Zone 900
- Stage of operation: NR
- 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/AALA202508040260

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: MID LAVATORY SMOKE ALARM VISUAL/LIGHT ON BUT NO AUDIO. MAINTENANCE ACCOMPLISHED INTERFACE AND POWER UP TEST OF THE CIDS PER AMM 23-73-00 WITH NO ISSUES NOTED. MAINTENANCE ACCOMPLISHED BITE TEST OF THE SMOKE DETECTION FUNCTION PER AMM 26-10-00 WOTH NOI ISSUES NOTED. MAINTENANCE PERFORMED OPERATIONAL CHECK OF LAVATORY SMOKE DETECTION SYSTEM PER AMM 26-17-00 WITH NO ISSUES NOTED. MAINTENANCE COULD NOT DUPLICATE FAULT.

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