# SDR AALA201811189004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 14, 2018
- Submitted: November 19, 2018
- Operation: Air carrier
- Aircraft: [N920AN](https://openairdocs.org/aircraft/N920AN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 29521
- Aircraft time: 56,378 hours, 22,809 cycles
- System (JASC): [2611 · Smoke Detection](https://openairdocs.org/jasc/2611)
- Part: Control Unit
- Part number: 473925
- Part serial: 14316
- Condition: Faulty
- Location: Zone 100
- Stage of operation: CR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: F, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA201811189004

## Discrepancy

ATL  FLT 1308 EN-ROUTE ORD - MIA. THE AIRCRAFT WAS GROUNDED. AFT CARGO FIRE LITE ILLUMINATED IN FLIGHT. DISCHARGED BOTTLE PER CHECKLIST. THE FLIGHT DECLARED AN EMERGENCY AND DIVERTED TO ATL WITHOUT FURTHER INCIDENT. AIRPORT INSPECTION SHOWED NO SIGNS OF FIRE SOURCE. MAINTENANCE REPLACED FORWARD CARGO, MOST FORWARD SMOKE DETECTOR (SEE SDR AALA20181115003) AND AFT CARGO DETECTOR B-2 (SEE SDR AALA201811189003) IAW MM 26-16-01, AND THE CEU IN IAW M/M 26-16-02. OP CKS NML ON GRD. ALSO REPLACED THE DISCHARGED AFT CARGO FIRE EXTINGUISHER BOTTLE IAW M/M 26-23-01. OPS CKS NML ON GRD.

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