# SDR AALA202601051556

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 31, 2025
- Submitted: January 5, 2026
- Operation: Air carrier
- Aircraft: [N907AN](https://openairdocs.org/aircraft/N907AN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 29509
- Aircraft time: 74,785 hours, 31,189 cycles
- System (JASC): [2821 · Aircraft Fuel Filter/Strainer](https://openairdocs.org/jasc/2821)
- Part: Fuel Filter
- Condition: Clogged
- Location: Zone 400
- Stage of operation: NR
- How discovered: V
- Nature of condition: S, J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202601051556

## Discrepancy

AIRCRAFT WAS GROUNDED: LEFT FUEL FILTER BYPASS ILLUMINATED. REMOVED AND REPLACED ENGINE NUMBER 1 FUEL FILTER DIFFERENTIAL PRESSURE SWITCH, PER AMM 73-34-01-400-801-F00 AND PERFORMED EEC TEST, PER AMM 73-21-00-700-804. OPERATIONAL AND LEAK CHECKED GOOD, NO FAULT AT THIS TIME.

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