# SDR UIEA2025033100419

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 31, 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: 91,547 hours, 16,879 cycles
- System (JASC): [2611 · Smoke Detection](https://openairdocs.org/jasc/2611)
- Part: Smoke Detector
- 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/UIEA2025033100419

## Discrepancy

DURING CRUSE FLIGHT, A FIRE MAIN DECK AFT EICAS MESSAGE ILLUMINATED. CREW RETURNED N438GT TO ANC.<BR>(<P>EFFECTED SMOKE DETECTORS 11 AND 12 FOR ZONE 12 LOOP A AND ZONE 11 LOOP A WERE REMOVED, CLEANED AND REINSTALLED. OPERATION TEST AND SYSTEM TEST WERE PERFORMED. CHECKS GOOD AND MESSAGE CLEARED IAW AMM 26-14-01.</P>)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.