# SDR SWAA031979

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 2, 2003
- Submitted: September 17, 2003
- Operation: Air carrier
- Aircraft: 083SW
- Make and model: Boeing 737-2H4
- Registry model: [Boeing 737-2H4](https://openairdocs.org/model/boeing-737-2h4) (OpenAirDocs)
- Aircraft serial: 22732
- Aircraft time: 67,527 hours, 73,832 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Fire Loop
- Part number: 6558234
- Condition: Faulty
- Location: Nr 2 Engine
- Stage of operation: CR
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA031979

## Discrepancy

NR 2 ENGINE FIRE WARNING, AFTER TESTING WARNING DISAPPEARED AND REAPPEARED SEVERAL TIMES, DID NOT SHUT ENGINE DOWN.  FOUND UPPER LOOP M336 HIGH IN RESISTANCE, REMOVED AND REPLACED UPPER LOOP PER MM.

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