# SDR AALA202509173276

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 16, 2025
- Submitted: September 17, 2025
- Operation: Air carrier
- Aircraft: [N879NN](https://openairdocs.org/aircraft/N879NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 31133
- Aircraft time: 40,576 hours, 17,549 cycles
- Engine: Cfmint CFM567B242
- System (JASC): [7310 · Engine Fuel Distribution](https://openairdocs.org/jasc/7310)
- Part: Fuel Filter
- Condition: Clogged
- Location: Lt Engine
- Stage of operation: CL
- 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/AALA202509173276

## Discrepancy

AIRCRAFT WAS GROUNDED: LEFT FUEL FILTER BYPASS LIGHT ILLUMINATED FOR APPROX 4 MINUTES. REMOVED AND REPLACED FUEL FILTER (AALA202509173276) AND FUEL PRESSURE SWITCH (AALA202509173475). PER AMM 73-11-02 AND AMM 73-34-01. LEAK AND OPERATIONAL CHECKS GOOD.

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