# SDR 2025FA0000413

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 20, 2025
- Submitted: June 20, 2025
- Operation: General aviation
- Aircraft: [N670L](https://openairdocs.org/aircraft/N670L), registered now
- Make and model: Diamon DA 40 NG
- Registry model: [Diamon DA 40 NG](https://openairdocs.org/model/diamond-aircraft-ind-da-40-ng) (OpenAirDocs)
- Aircraft serial: 40NC081
- Aircraft time: 4,220 hours
- Engine: Austro E4
- Engine time: 659 hours
- System (JASC): [7321 · Fuel Control/Turbine Engines](https://openairdocs.org/jasc/7321)
- Part: Ecu
- Condition: Faulted
- Location: Engine
- Stage of operation: AP
- How discovered: O
- Nature of condition: E, K, R
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2025FA0000413

## Discrepancy

PILOT REPORT: COMING BACK IN ON LIFT ARRIVAL, FELT ENGINE SHUDDER FOLLOWED BY DUAL ECU FAILURE. ECU A KEPT COMING ON AND OFF. INTERMITTENT POWER LOSS, HEADING TO 2R2. COMING INTO LAND AT 2R2, HAD LOSS OF OIL PRESSURE. MAINTENANCE FINDINGS: FOUND ROCKER COVER PENITRATED. REMOVED COVER AND FOUND #4 CYLINDER ROCKER BROKEN. PERFORMED BORESCOPE AND FOUND BROKEN VALVE AND DAMAGED PISTON.

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