# SDR CALA2017050501242

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 3, 2017
- Submitted: May 5, 2017
- Operation: Air carrier
- Aircraft: [N122UA](https://openairdocs.org/aircraft/N122UA), registered now
- Make and model: Boeing 747422
- Aircraft serial: 29168
- Aircraft time: 72,085 hours, 8,121 cycles
- System (JASC): [2611 · Smoke Detection](https://openairdocs.org/jasc/2611)
- Part: Fire Warning
- 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/CALA2017050501242

## Discrepancy

FIRE ALARM ACTIVATED IN LAV NEAR DOOR 3 WHILE  IN FLIGHT. NO EVIDENCE OF SMOKE ON ARR. FIRE EXTINGUISHER CKED OK. SMOKE DETECTOR TEST PASSED AT ALL LAVS DOOR 3 PER AMM 26-13-00.

---
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.