# SDR UPS97422376

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 14, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N675UP](https://openairdocs.org/aircraft/N675UP), registered now
- Make and model: Boeing 747123
- Aircraft serial: 20390
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Fire Loop
- Condition: Malfunctioned
- Location: Nr 4 Engine
- Stage of operation: CR
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS97422376

## Discrepancy

INSPECTION TYPE-N/A, AT CRUISE ALTITUDE FL330 NR 4 A-LOOP FIRE DETECTOR FAULT LIGHT ILLUMINATED.  FIRE DETECTOR NACELLE TEMP INDICATOR WAS FLUXUATING FROM 0 TO FULL SCALE SELECTED B-LOOP AND FOLLOWED AOM PROCEDURE.  RE-RACK ENGINE NR 4 A-LOOP CARDS, OPS CHECK NORMAL.

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