# SDR SWAA2026082716808

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 23, 2026
- Submitted: August 28, 2026
- Operation: Air carrier
- Aircraft: [N7878A](https://openairdocs.org/aircraft/N7878A), registered now
- Make and model: Boeing 737-7K9
- Registry model: [Boeing 737-7K9](https://openairdocs.org/model/boeing-737-7k9) (OpenAirDocs)
- Aircraft serial: 34320
- Aircraft time: 63,546 hours, 33,160 cycles
- System (JASC): [2613 · Overheat Detection](https://openairdocs.org/jasc/2613)
- Part: Overheat Loop
- Condition: Faulted
- Location: Zone 100
- Stage of operation: NR
- 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/SWAA2026082716808

## Discrepancy

LEFT WTB OVERHEAT LIGHT ILLUMINATED ON TAXI OUT WITH LEFT PACK RUNNING ON APU BLEED SOURCE. PERFORMED QRH, LIGHT EXTINGUISHED WITH PACK OFF_ OK TO CONTINUE PER MEL 26-12-01 SP1 PERFORMED FIM 26-18 TASK 809 FOUND OPEN AT LOOP M1911. REMOVED AND REPLACED SENSE LOOP M1911 PER AMM 26-18-02. OPS CHECK GOOD.

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