# SDR P5CA2024121600050

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 16, 2024
- Submitted: December 16, 2024
- Operation: Air carrier
- Aircraft: [N857GT](https://openairdocs.org/aircraft/N857GT), registered now
- Make and model: Boeing 747-87UF
- Registry model: [Boeing 747-87UF](https://openairdocs.org/model/boeing-747-87uf) (OpenAirDocs)
- Aircraft serial: 37568
- Aircraft time: 56,953 hours, 8,839 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Pcb
- Part number: 285U0084219
- Part serial: D05153
- Condition: Faulted
- Location: Fire Detection
- 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/P5CA2024121600050

## Discrepancy

MASTER WARNING LIGHTS (RED) AND BELL WERE ACTIVATING EVERY 90 SECONDS WITH NO EICAS OR OTHER RED LIGHTS ILLUMINATING.(<P>REMOVED AND REPLACED MASTER MONITOR A & MAWEA PCC IAW B747 AMM 31-51-02. OPS CHECK GOOD. PART EFFECTIVITY VERIFIED PER IPC 31-51-02-01.</P>)

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