# SDR N3XR20210208001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 8, 2021
- Submitted: March 17, 2021
- 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)
- Make and model: Diamon DA 42
- Registry model: [Diamon DA 42](https://openairdocs.org/model/diamond-aircraft-ind-da-42) (OpenAirDocs)
- Aircraft serial: 42N210
- Aircraft time: 2,837 hours
- Engine: Austro E4
- Engine time: 1,100 hours
- System (JASC): [6122 · Propeller Governor](https://openairdocs.org/jasc/6122)
- Part: Flywheel
- Part number: E4B73000000KIT
- Part serial: 038811
- Condition: Worn
- Location: Lt Wing
- Part time: 499 hours
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/N3XR20210208001

## Discrepancy

DURING A ROUTINE ANNUAL INSPECTION, THE MASS FLYWHEEL (TVD) UNIT WAS INSPECTED AS REQUIRED AT 600 TIS. THE INSPECTION REQUIRES A MEASUREMENT OF THE RIVETS IN THE CENTER ASSEMBLY. THEY WERE WORN BEYOND LIMITS AND THE FLYWHEEL WAS REPLACED WITH A NEW UNIT.

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