# SDR K11A2025120300362

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 3, 2025
- Submitted: December 3, 2025
- Operation: Air carrier
- Aircraft: [N403CK](https://openairdocs.org/aircraft/N403CK), registered now
- Make and model: Boeing 737-4Q8
- Registry model: [Boeing 737-4Q8](https://openairdocs.org/model/boeing-737-4q8) (OpenAirDocs)
- Aircraft serial: 26280
- Aircraft time: 60,670 hours, 37,057 cycles
- System (JASC): [7261 · Turbine Engine Oil System](https://openairdocs.org/jasc/7261)
- Part: Oil System
- Condition: Leaking
- Location: Nr 1 Engine
- Stage of operation: TO
- How discovered: O
- Nature of condition: K, B
- Precautionary procedure: C
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/K11A2025120300362

## Discrepancy

AFTER FURTHER INVESTIGATION OIL WAS FOUND AROUND AND IN NR 1 ENGINE INLET COWL AND BOOSTER MODULE. R&R ENGINE NR 1 IAW AMM 71-00-02. PERFORMED TEST 9 IAW AMM 71-00-00 ALL CHECKS GOOD NO DEFECTS NOTED AT THIS TIME.  ENGINE: CFM563C1

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