# SDR SWAA2026091624496

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 12, 2026
- Submitted: September 17, 2026
- Operation: Air carrier
- Aircraft: [N8637A](https://openairdocs.org/aircraft/N8637A), registered now
- Make and model: Boeing 737-8H4
- Registry model: [Boeing 737-8H4](https://openairdocs.org/model/boeing-737-8h4) (OpenAirDocs)
- Aircraft serial: 42523
- Aircraft time: 41,234 hours, 20,044 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Fire Loop
- Condition: No Test
- Stage of operation: TX
- How discovered: C
- Nature of condition: L
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2026091624496

## Discrepancy

CREW REPORTED, FIRE WARNING/OVERHEAT-B LOOP WILL NOT TEST,    OK TO CONTINUE. PER MEL 26-2-01XB.  NR 1 ENG REMOVED AND REPLACED FIRE LOOPS ENG CORE LEFT ENG FAN LOWER AND ENGINE FAN UPPER AS PER AMM 26-11-01.

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