# SDR UIEA2012022300059

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 22, 2012
- Submitted: February 24, 2012
- Operation: Air carrier
- Aircraft: [N263SG](https://openairdocs.org/aircraft/N263SG), registered now
- Make and model: Boeing 747481
- Aircraft serial: 29263
- Aircraft time: 39,151 hours, 5,276 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Circuit Card
- Condition: Malfunctioned
- Location: Fire Detection
- Stage of operation: CL
- How discovered: O
- Nature of condition: N
- Precautionary procedure: E, J, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2012022300059

## Discrepancy

NR 4 ENGINE FIRE WARNING MESSAGE. COMPLIED WITH QRH, AIR TURN BACK, IN-FLIGHT SHUTDOWN.  MX CURRENTLY TROUBLESHOOTING CARDS. UPPER FWD LOOP & AMP  AFT LWR REPLACED. MX TO REPLACE LWR FWD & AMP UPPER AFT. INSPECTED PER EO 4426A052. ACCOMPLISHED ENGINE BLEED CHECKS PER MM. ALL SYSTEMS OPERATE NORMAL.

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