# SDR EVCA2020030600000

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 6, 2020
- Submitted: March 6, 2020
- Operation: Air carrier
- Aircraft: [N499AE](https://openairdocs.org/aircraft/N499AE), registered now
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 53367
- Aircraft time: 8,776 hours, 27,921 cycles
- System (JASC): [6300 · Main Rotor Drive System](https://openairdocs.org/jasc/6300)
- Part: Freewheel Unit
- Part number: 406040500147
- Part serial: A7712
- Condition: Cracked
- Part time: 4,248 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/EVCA2020030600000

## Discrepancy

DURING PERIODIC INSPECTION, THE FREEWHEELING UNIT HOUSING WAS VISUALLY DISCOVERED TO BE CRACKED ON THE MATING SURFACE TO THE ENGINE. THE CRACK EXTENDED APPROXIMATELY 0.5 INCHES FROM THE ATTACHMENT HOLE.

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