# SDR N3XR20250414001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 20, 2025
- Submitted: April 14, 2025
- Operation: General aviation
- Filed by: [Embry-Riddle Aeronautical University Inc, repair station N3XR816N](https://openairdocs.org/faa-repair-station/N3XR816N/embry-riddle-aeronautical-university-inc.md) (OpenAirDocs)
- Aircraft: [N327ER](https://openairdocs.org/aircraft/N327ER), registered now
- Make and model: Diamon DA 42
- Registry model: [Diamon DA 42](https://openairdocs.org/model/diamond-aircraft-ind-da-42) (OpenAirDocs)
- Aircraft serial: 42N553
- Aircraft time: 274 hours
- Engine: E4C
- Engine time: 274 hours
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Cylinder Head
- Part number: E4A00M02BHY
- Condition: Out Of Tolerance
- Location: Engine
- Part time: 274 hours
- Stage of operation: TO
- How discovered: O
- Nature of condition: E
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/N3XR20250414001

## Discrepancy

DURING TAKEOFF OFF THE #1 (LT. ) ENGINE MADE A LOUD POPPING NOISE AND WAS ROUGH. AFTER CONSULTATION WITH MANUFACTURER, THE CYLINDER HEAD ASSEMBLY WAS CHANGED. THE CONDITION DID NOT OCCUR ON POST MAINTENANCE FLIGHT ANDSUBSEQUENT FLIGHTS.

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