# SDR CALA2026020113459

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 31, 2026
- Submitted: February 2, 2026
- Operation: Air carrier
- Aircraft: [N17599](https://openairdocs.org/aircraft/N17599), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 67640
- Aircraft time: 2,546 hours, 829 cycles
- System (JASC): [2611 · Smoke Detection](https://openairdocs.org/jasc/2611)
- Part: Smoke Detector
- Condition: False Indication
- Location: Zone 900
- 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/CALA2026020113459

## Discrepancy

FIRE ALARM WENT OFF IN LAV 2L.  THERE WAS NO  SMOKE OR FIRE ASSOCIATED WITH IT.   INSPECTION OF AFT LT LAV SMOKE DETECTOR, NO AURAL TONE HEARD AND FOUND NO EVIDENCE OF SMOKE OR ANY BURNING ODOR IN THE LAV.  PERFORMED OPS CHECK OF THE LAV SMOKE DETECTOR IAW AMM 26-14-01, OPS CHKD NORMAL. NO HISTORY IN THE LAST 30 DAYS.  OK FOR SERVICE.

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