# SDR N3XR 08 13

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 4, 2026
- Submitted: August 13, 2026
- 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: [N323ER](https://openairdocs.org/aircraft/N323ER), 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: 42N550
- Aircraft time: 1,282 hours
- Engine: Austro E4
- Engine time: 598 hours
- System (JASC): [8500 · Engine (Reciprocating)](https://openairdocs.org/jasc/8500)
- Part: Crankcase
- Part number: E4A10100202
- Condition: Punctured
- Location: Left Engine
- Part time: 598 hours
- Stage of operation: CL
- How discovered: O
- Nature of condition: K, B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/N3XR%2008%2013

## Discrepancy

LEFT ENGINE OIL LEAK ON TAKEOFF WITH WHITE SMOKE, CREW FEATHERED AND LANDED. DURING INSPECTION, A HOLE WAS FOUND IN THE CRANKCASE, AND ANOTHER LOCATION SHOWED A FRACTURED CASE. THE ENGINE WAS DISASSEMBLED, AND A CRANKSHAFT BOLT E4A-10-100-202 WAS FOUND TO HAVE FAILED. THE HEAD OF THE BOLT HAD MIGRATED THROUGH THE LOWER POWER SECTION, CAUSING DAMAGE TO THE ENGINE CASE AND INTERNAL ENGINE ITEMS. THE ENGINE WAS REPLACED.

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