# SDR 9712739936

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 28, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N1799U
- Make and model: Doug DC-9-31
- Registry model: [Doug DC-9-31](https://openairdocs.org/model/douglas-dc-9-31) (OpenAirDocs)
- Aircraft serial: 47370
- System (JASC): [2540 · Lavatories](https://openairdocs.org/jasc/2540)
- Part: Call Switch
- Condition: Wire Failed
- Location: Lt Aft Lavatory
- Stage of operation: TX
- Nature of condition: B
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/9712739936

## Discrepancy

LEFT AFT LAVATORY SMOKE DETECTOR SOUNDED DURING TAXI-OUT.  AIRCRAFT WAS RETURNED TO THE GATE.  MAINTENANCE FOUND LAVATORY CALL BUTTON JAMMED AND WIRING BURNED BEHIND SWITCH.  REPLACED SWITCH AMD MODULE, OPERATIONAL CHECK NORMAL.

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