# SDR 96ZZZM1479

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 1, 1996
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N93107
- Make and model: Boeing 747131
- Aircraft serial: 19673
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Fireloop
- Part number: 895398
- Condition: Failed
- Location: Nr 4 Engine
- Stage of operation: CL
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/96ZZZM1479

## Discrepancy

FCO - DURING CLIMB, NR 4 ENGINE, S/N 4275, NACELLE TEMPERATURE INDICATED HIGH.  CHECKED ENGINE DUCTS FOR AIR LEAKS AND RUPTURES, NONE FOUND.  REPLACED LOWER FORWARD AND LOWER AFT FIREWARNING LOOPS, MFG P/N 895397 AND 895398, RESPECTIVELY. PERFORMED FAN TIEDOWN CHECK, RAN ENGINE AT HIGH POWER FOR NINE MINUTES WHILE MONITORING NACELLE TEMPERATURE, ALL  INDICATIONS NORMAL.

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