# SDR IPXA2023051069906

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 9, 2023
- Submitted: May 10, 2023
- Operation: Air carrier
- Aircraft: [N579UP](https://openairdocs.org/aircraft/N579UP), registered now
- Make and model: Boeing 747-45E
- Registry model: [Boeing 747-45E](https://openairdocs.org/model/boeing-747-45e) (OpenAirDocs)
- Aircraft serial: 26062
- Aircraft time: 114,380 hours, 19,302 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Fire Warning
- Part number: 215655
- Part serial: BN103722
- Condition: False Activation
- Stage of operation: TX
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/IPXA2023051069906

## Discrepancy

INTERMITTENT FWD CARGO FIRE WARNING ANNUNCIATED, AURAL WARNING, AND EICAS MULTIPLE TIMES REF SSM 26-16-01 SHEET4. WITH POWER ON AIRCRAFT, AT DR5227 SOCKETS 3 AND 9 WERE ZERO VOLTS DC. REPLACED DETECTOR A2 LL ZONE 3 FWD. STA 710 LBL 41. REF. MM 26-16-01-401. SYSTEM TESTS GOOD.

---
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.