# SDR CALA2023050501358

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 3, 2023
- Submitted: May 5, 2023
- Operation: Air carrier
- Aircraft: [N78509](https://openairdocs.org/aircraft/N78509), registered now
- Make and model: Boeing 737824
- Aircraft serial: 31638
- Aircraft time: 49,604 hours, 17,368 cycles
- System (JASC): [2611 · Smoke Detection](https://openairdocs.org/jasc/2611)
- Part: Smoke Detector
- Part number: P904000091
- Condition: Unknown
- Location: Aft Left Lav
- Stage of operation: NR
- How discovered: O
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2023050501358

## Discrepancy

AFT LAV L SMOKE ALARM ACTIVATED FOR 30SEC NOTICED SLIGHT ELECTRI CAL SMELL NOTED WITH NO SMOKE AND NO FIRES FOUND INSIDE LAVATORY WASTE GALLEY INSPECTION AS REQUIRED WITH REFERENCE TO THE APPLICABLE GOOD AT THIS TIME. CONTAINER. STEPS IN THE BOEING 737 AMM 05-51-26.  NO DISCREPANCIES NOTED DURING GENERAL VISUAL INSPECTION, OPS CHECK GOOD. DEBRIEFED CREW FOR AFT LEFT LAVATORY D SMOKE DETECTOR ALARM. COMPLIED WITH AFT LEFT LAVATORY D AND AFT RIGHT LAVATORY E STARTED AND RAN THE APU FOR FIFTEEN MINUTES WITH BOTH PACKS NO HISTORY NOTED FOR SMOKE OR ODOR IN THE CABIN AND NO HISTORY CREW REPRTED SMOKE DETECTOR ALARM WHILE DEPLANING AFTER ARRIVAL INSPECTION AS REQUIRED WITH REFERENCE TO THE APPLICABLE STEPS IN OPERATING.  NO ODOR OR SMOKE NOTED DURING OPERATION.  PERFORMED NOTED FOR AFT LEFT LAVATORY D SMOKE DETECTOR ALARM GOING OFF. TO GATE.  ALARM SOUNDED FOR THIRTY SECONDS WITH NO PASSENGERS THE BOEING 737 AMM 05-51-26.  NO DISCREPANCIES NOTED DURING NORMAL SHUTDOWN OF BOTH PACKS AND APU WITH NO ORDOR OR SMOKE PERFORMED OPS CHECK OF AFT LEFT SMOKE DETECTOR WITH REFERENCE TO INSIDE.  WHEN CREW INVESTIGATED ALARM, AN ELECTRICAL ODOR WAS GENERAL VISUAL INSPECTION, OPS CHECK GOOD.  COMPLIED WITH AFT NOTED DURING SHUTDOWN. THE APPLICABLE STEPS IN THE BOEING 737 AMM 26-14-00.  OPS CHECK COMPLIED WITH AFT GALLEY, AFT LEFT LAVATORY D AND AFT RIGHT AT THIS TIME.  TOMC CONTACTED ABOUT DISCREPANCY, NO FURTHER LAVATORY E INSPECTION AND OPERATIONAL TESTS AS REQUIRED WITH INSPECTION NEEDED AT

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