# SDR AALA202009229009

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 20, 2020
- Submitted: September 23, 2020
- Operation: Air carrier
- Aircraft: [N772AN](https://openairdocs.org/aircraft/N772AN), registered now
- Make and model: Boeing 777223
- Aircraft serial: 29580
- Aircraft time: 84,269 hours, 10,709 cycles
- System (JASC): [2611 · Smoke Detection](https://openairdocs.org/jasc/2611)
- Part: Smoke Detector
- Part number: PU90471WR1
- Condition: False Activation
- Location: L1 Lavatory
- Stage of operation: CR
- 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/AALA202009229009

## Discrepancy

AIRCRAFT NOT GROUNDED.  L1 LAVATORY SMOKE DETECTOR CHIME AND AURAL ALERT SOUNDED MANY TIMES IN FLIGHT, NO SMOKE PRESENT.  PERFORMED LAVATORY SMOKE DETECTION-SELF TEST, PER AMM TASK 26-13-00-740-801, SELF TEST PASSED.  NO LAV SMOKE DETECTION HISTORY, OKAY FOR SERVICE.

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