# SDR UPS01435613

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 17, 2001
- Submitted: April 25, 2001
- Operation: Air carrier
- Aircraft: N674UP
- Make and model: Boeing 747123F
- Aircraft serial: 20100
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Fire Loop
- Condition: Inoperative
- Location: Nr 4 Engine
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UPS01435613

## Discrepancy

INSPECTION TYPE:N/A PREFLIGHT NR 4 ENGINE FIRE WARNING FAILED TO TEST WHEN MOVING TEST SWITCH TO UPPER POSITION NR 4 ENG NACELLE IND AND FIRE HANDLE INOP AND WHEN TO DOWN POSITION ONLY NR 1 FIRE HANDLE TESTS     REPAIRED BROKEN TERMINAL ENDS ON LOWER NR 4 FWD FIRE LOOP REF WDM 26-11-04 ENG FIRE DETECTION SYS OPS CKS GOOD IAW M/M 26-11-04

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