# SDR UIEA2025033000416

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 30, 2025
- Submitted: April 2, 2025
- Operation: Air carrier
- Aircraft: [N438GT](https://openairdocs.org/aircraft/N438GT), registered now
- Make and model: Boeing 747409F
- Aircraft serial: 30766
- Aircraft time: 91,541 hours, 16,878 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Fire Detector
- Part number: 2156756A
- Part serial: 21730B
- Condition: False Activation
- Location: Zone 200
- Stage of operation: CR
- 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/UIEA2025033000416

## Discrepancy

DURING FLIGHT, CREW INDICATED FIRE MAIN DECK AFT EICAS MESSAGE. CREW RETURNED TO ANC FOLLOWING EVENT.(<P>REPLACED THE MAIN DECK ZONE 12 LOOP A DETECTOR IAW AMM 26-14-01. OPS CHECK GOOD. TEST PASSED MESSAGE CLEARED.

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