# SDR SWAA2020051233188

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 21, 2020
- Submitted: May 12, 2020
- Operation: Air carrier
- Aircraft: N746SW
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 29798
- Aircraft time: 72,738 hours, 42,919 cycles
- System (JASC): [2611 · Smoke Detection](https://openairdocs.org/jasc/2611)
- Part: Smoke Detector
- Condition: False Activation
- Location: Lavatory
- Stage of operation: DE
- How discovered: O
- Nature of condition: N
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2020051233188

## Discrepancy

ON DESCENT A. FA CALLED TO NOTIFY CREW THAT AFT SMOKE DETECTOR WAS SOUNDING OFF WITH NO OTHER INDICTAIONS AT ALL. / RESET SMOKE ALARM GREEN LIGHT SHOWS GOOD. PERFORMED AFT LAV SMOKE DETECTOR SELF TEST. TEST PASSED. REF AMM 26-14-00. INSPECTED LAV. NO DEFECTS NOTED. FIRE BOTTLE UNDER SINK WAS NOT DISTURBED. HEAT INDICATOR STRIP IS STIL GOOD. NO DEBRIS IN LAV WASTE CONTAINER

---
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.