# SDR CALA2026092419789

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 24, 2026
- Submitted: September 25, 2026
- Operation: Air carrier
- Aircraft: [N77296](https://openairdocs.org/aircraft/N77296), registered now
- Make and model: Boeing 737824
- Aircraft serial: 34002
- Aircraft time: 60,206 hours, 22,195 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Fire Detector
- Condition: False Activation
- Location: Zone 100
- Stage of operation: CL
- 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/CALA2026092419789

## Discrepancy

AFT CARGO FIRE INDICATED PERFORMED QRC RETURNED TO KCMH VISUALLY INSPECTED AFT PIT, NO EVIDENCE OF ACTUAL FIRE OR SMOKE IN AFT PIT. AFT CARGO FIRE LIGJT (FALSE ALARM) IS FAULT CODE 261 225 45. PERFORMED FIM 26-16 TASK 801. NO DETECTOR FAULTS FOUND BY BITE.   REPLACED ALL AFT CARGO SMOKE DETECTORS PRECAUTIONARY (L/P 3462300). REPLACED AFT CARGO CEU PRECAUTIONARY (L/P 3462312). REPLACED CARGO FIRE CONTROL PANEL PRECAUTIONARY (L/P 3462342). ALL INSTALLATION AND BITE TESTS GOOD.

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