# SDR DT1R20130425003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 23, 2013
- Submitted: April 25, 2013
- Operation: General aviation
- Filed by: [Leonardo Helicopters U.S. Corporation, repair station DT1R098K](https://openairdocs.org/faa-repair-station/DT1R098K/leonardo-helicopters-u-s-corporation.md) (OpenAirDocs)
- Aircraft: N143CF
- Make and model: Agusta A109E
- Registry model: [Agusta A109E](https://openairdocs.org/model/agusta-a109e) (OpenAirDocs)
- Aircraft serial: 11142
- Aircraft time: 4,924 hours
- Engine: Pwc PW206C
- System (JASC): [6320 · Main Rotor Gearbox](https://openairdocs.org/jasc/6320)
- Part: Gear
- Part number: 109040307103
- Part serial: E43526
- Condition: Cracked
- Location: M/R Gearbox
- Part time: 4,278 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/DT1R20130425003

## Discrepancy

DURING THE ACCOMPLISHMENT OF AN TECHNICAL BULLETIN BT109EP-128 ON A MAIN GEARBOX; A CROWN GEAR, WAS FOUND TO HAVE A CRACK.  THE CROWN GEAR WILL BE REPLACED BY A NEW SUPPORT ASSY.

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