# SDR SWAA2026082141542

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 24, 2026
- Submitted: August 22, 2026
- Operation: Air carrier
- Aircraft: [N7879A](https://openairdocs.org/aircraft/N7879A), registered now
- Make and model: Boeing 737-7K9
- Registry model: [Boeing 737-7K9](https://openairdocs.org/model/boeing-737-7k9) (OpenAirDocs)
- Aircraft serial: 34321
- Aircraft time: 62,644 hours, 32,875 cycles
- System (JASC): [2612 · Fire Detection](https://openairdocs.org/jasc/2612)
- Part: Control Module
- Condition: Faulted
- Location: Zone 400
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2026082141542

## Discrepancy

NR 2 ENGINE OVERHEAT LIGHT ILLUMINATED AFTER START.  PERFOMED BITE TEST OF ENGINE FIRE DETECTION CONTROL MODULE REF FIM 26-10 TASK 801. NO FAULTS PRESENT. PER FIM 26-10 TASK 811 NEXT STEP REQUIRES HIGHT POWER ENGINE RUN. PER FIM 26-10 NO OBVIOUS DEFECTS  RESISTANCE CHECK IS GOOD STILL REQUIRES HIGH POWER RUN. REF TTG8Q01DCUH FOR BITE CHECK OF ENGINE FIRE DETECTION MODULE AND RESISTANCE CHECKS OF ENG FIRE DETECTION LOOP. PERFORMED INSPECTION OF #2 ENG CORE PER FIM 26-10 TASK 811. NO OBVIOUS DEFECTS. PERFORMED IDLE RUN OF #2 EN PER AMM 71-00-00. NO FAULTS NOTED. PERFORMED HIGH POWER RUN PER FIM 26-10 TASK 811. NO FAULTS NOTED. OVERHEAT LIGHT DID NOT ILLUMINATE.

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