# SDR MALA070012

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 20, 2007
- Submitted: January 22, 2007
- Operation: Air carrier
- Aircraft: N443XJ
- Make and model: Saab 340B
- Registry model: [Saab 340B](https://openairdocs.org/model/saab-340b) (OpenAirDocs)
- Aircraft serial: 340B443
- Aircraft time: 20,142 hours, 22,201 cycles
- System (JASC): [2611 · Smoke Detection](https://openairdocs.org/jasc/2611)
- Part: Smoke Detector
- Part number: 7211121100
- Part serial: B5488
- Condition: Malfunctioned
- Location: Avionics Bay
- Stage of operation: NR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/MALA070012

## Discrepancy

JUST AFTER DEPARTURE THE CREW REPORTED THAT THE CWP AVIONICS SMOKE WARNING ACTIVATED INTERMITTENTLY.  THERE WAS NO OBSERVATION OF SMOKE OR SMELL OF FUMES.  FA REPORTED A BURNING SMELL.  THE FLIGHT RETURNED TO DTW AND LANDED WITHOUT FURTHER INCIDENT.  AN EMERGENCY WAS DECLARED.  REMOVED AND REPLACED AVIONICS SMOKE DETECTOR IAW AMM 26-13-05 NO BURNING SMELL NOTED.  ALL CHECKS GOOD, P/N ON OFF 72-111211-00 S/N ON A5305 S/N OFF B5488.

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