# SDR AALA202104129001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 11, 2021
- Submitted: April 19, 2021
- Operation: Air carrier
- Aircraft: [N790AN](https://openairdocs.org/aircraft/N790AN), registered now
- Make and model: Boeing 777223
- Aircraft serial: 30251
- Aircraft time: 77,811 hours, 9,968 cycles
- System (JASC): [2611 · Smoke Detection](https://openairdocs.org/jasc/2611)
- Part: Smoke Detector
- Condition: False Activation
- Location: Lavatory
- Stage of operation: NR
- How discovered: 9
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202104129001

## Discrepancy

AIRCRAFT WAS NOT GROUNDED: SMOKE LAVATORY CAUTION ON ENGINE INDICATING AND CREW ALERTING SYSTEM AND SMOKE DETECTOR AURAL ALERT LAVATORY 3R-1 AND 3R-2 WITH NO SMOKE. : FAULT ISOLATION MANUAL TASK 26-14-00-810-808, OBSERVED NO MAINTENANCE ACTION IS NECESSARY, LAVATORY SMOKE DETECTION OPERATIONAL TEST PER AMM 26-13-00-710-801 CARRIED OUT AND PASSED SUCCESSFULLY. NO ACTIVE PRESENT FAULTS.

---
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.