# SDR UIEA2021013100161

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 30, 2021
- Submitted: February 2, 2021
- Operation: Air carrier
- Aircraft: [N487MC](https://openairdocs.org/aircraft/N487MC), registered now
- Make and model: Boeing 747-45EF
- Registry model: [Boeing 747-45EF](https://openairdocs.org/model/boeing-747-45ef) (OpenAirDocs)
- Aircraft serial: 30609
- Aircraft time: 83,495 hours, 15,602 cycles
- System (JASC): [2611 · Smoke Detection](https://openairdocs.org/jasc/2611)
- Part: Smoke Detector
- Part number: 2156756A
- Part serial: 22132B
- Condition: False Activation
- Location: Main Deck Cargo
- Stage of operation: CR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: G, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2021013100161

## Discrepancy

EICAS MSG FIRE MN DK AFT NO SMOKE OR FLAMES.  CREW FOLLOWED QRH AND DEPRESSURIZED AIRCRAFT WHICH CAUSED THE O2 MASK DEPLOYMENT.  R & R MCD SMOKE DETECTORS 12A AND 12B IAW AMM 26-14-01.  OFF PN 2156-756A SN 20590B.  OPS CHECK GOOD.  MX RESTOWED ALL O2 MASKS IAW AMM 35-21-06.

---
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.