# SDR SWAA990530

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 17, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N61SW](https://openairdocs.org/aircraft/N61SW), registered now
- Make and model: Boeing 737-2H4
- Registry model: [Boeing 737-2H4](https://openairdocs.org/model/boeing-737-2h4) (OpenAirDocs)
- Aircraft serial: 21970
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Fire Loop
- Part number: 6558234
- Condition: Shorted
- Location: Nr 1 Engine
- Stage of operation: CL
- Nature of condition: J
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA990530

## Discrepancy

AIR TURNBACK DUE TO LEFT FIRE LIGHT ILLUMINATED ON CLIMB-OUT.  AFTER LEFT OVERHEAT DETECTOR SWITCH WAS MOVED TO FIRE, THE LIGHT WENT OUT.  ON ENGINES SHUT DOWN THE PROBLEM STILL EXISTED.  REMOVED AND REPLACED NR 1 ENG LOWER FIRE LOOP PER MM.

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