# SDR AALA202501024023

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 30, 2024
- Submitted: January 2, 2025
- Operation: Air carrier
- Aircraft: [N939NN](https://openairdocs.org/aircraft/N939NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 33491
- Aircraft time: 33,029 hours, 13,523 cycles
- Engine: Cfmint CFM567B242
- Engine time: 34,814 hours, 14,854 cycles
- System (JASC): [7310 · Engine Fuel Distribution](https://openairdocs.org/jasc/7310)
- Part: Pressure Switch
- Part number: QA07995
- Condition: Faulted
- Location: Nr 2 Engine
- 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/AALA202501024023

## Discrepancy

AIRCRAFT WAS GROUNDED: THE # 2 ENGINE FUEL FILTER BYPASS LIGHT ILLUMINATED FOR TWO MINUTES AFTER TAKEOFF AND REPEATEDLY THROUGHOUT THE FLIGHT. MAINTENANCE REPLACED THE #2 ENGINE FULE FILTER PER AMM 73-11-02 (AALA202501026652) AND THE FUEL FILTER DIFFERENTIAL PRESSURE SWITCH PER AMM 73-34-01. (AALA202501024023) A SATISFACTORY LEAK / OPERATIONAL CHECK WAS ACCOMPLISHED.

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