# SDR CALA2026042915814

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 28, 2026
- Submitted: April 29, 2026
- Operation: Air carrier
- Aircraft: [N29717](https://openairdocs.org/aircraft/N29717), registered now
- Make and model: Boeing 737724
- Aircraft serial: 28936
- Aircraft time: 79,182 hours, 28,989 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Fire Warning
- Condition: False Activation
- 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/CALA2026042915814

## Discrepancy

LAV D FIRE ALARM ACTIVE LAV BOTTLE FIRE EXTINGUISHER DID NOT A CTIVATE PER FLIGHT CREW, NO SMOKE OR ODOR NOTICED WHEN ALARM WENT OFF. FA DID NOT TRY RESETTING SMOKE ALARM SOUND. UPDATED MAA CODE FIX USING VENDOR MAA SCREEN PLEASE CONTACT TOMC BEFORE COMMENCING ANY WORK. MAC METER INITIATED FOR  WITH VENDOR ID MAC RELATED WORK ORDER 000000003213162 AND PRTR  ITEM ON MEL.  ITEM ON MEL. DEFERRED DIRECTLY BY TOMC FIRE EXTINGUISHING BOTTLE IS NOT ACTIVATED BY SMOKE ALARM. IT IS ONLY HEAT ACTIVATED.  SYSTEM OPERATES NORMAL.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.