# SDR UIEA2016051300283

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 13, 2016
- Submitted: May 16, 2016
- Operation: Air carrier
- Aircraft: [N473MC](https://openairdocs.org/aircraft/N473MC), registered now
- Make and model: Boeing 747-45E
- Registry model: [Boeing 747-45E](https://openairdocs.org/model/boeing-747-45e) (OpenAirDocs)
- Aircraft serial: 27174
- Aircraft time: 94,261 hours, 16,675 cycles
- System (JASC): [2611 · Smoke Detection](https://openairdocs.org/jasc/2611)
- Part: Smoke Detector
- Part number: PPC120000
- Part serial: 1865
- Condition: False Activation
- Location: Cargo Bay
- 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/UIEA2016051300283

## Discrepancy

AIR TURN BACK. AFTER TAKEOFF, MASTER WARNING FIRE CARGO AFT.  QRH PROCEDURES COMPLETED.  ACFT RETURNED & MAIN DECK CARGO COMPARTMENT PHYSICALLY CHECKED.  NO EVIDENCE OF SMOKE OR FIRE.  SUSPECT FAULT OCCURRED DUE TO MOISTURE.  STATUS MSG, MD CARGO 15,11,10 LP A, MD CGO 4,9,16 LP B.  FOUR SMOKE DETECTORS REPLACED & TESTED OK.

---
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.