# SDR U2RA201402070001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 7, 2014
- Submitted: February 9, 2014
- Operation: Air carrier
- Aircraft: [N952CA](https://openairdocs.org/aircraft/N952CA), registered now
- Make and model: Boeing 747428
- Aircraft serial: 25238
- Aircraft time: 84,738 hours, 12,106 cycles
- Engine: Ge CF680C2B1F
- System (JASC): [2611 · Smoke Detection](https://openairdocs.org/jasc/2611)
- Part: Smoke Detector
- Condition: Failed
- Location: Main Cargo
- 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/U2RA201402070001

## Discrepancy

MAIN DECK CARGO FIRE ALARM ACTIVATED DURING CRUISE.  CREW CHECKED AND NO INDICATION OF FIRE OBSERVED. TROUBLESHOT SYSTEM IAW FIM 26-16 AND FOUND DETECTORS 10, 11, 12, 14, 16 ON LOOP "B" FAILED.

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