# SDR CA120822004

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 21, 2012
- Submitted: September 14, 2015
- Operation: General aviation
- Make and model: Agusta AW139
- Registry model: [Agusta AW139](https://openairdocs.org/model/agustawestland-philadelphia-aw139) (OpenAirDocs)
- Engine: Pwc PT6C67C
- System (JASC): [6220 · Main Rotor Head](https://openairdocs.org/jasc/6220)
- Part: Damper
- Part number: 3G6220V01352
- Condition: Failed
- Location: Main Rotor
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA120822004

## Discrepancy

(CAN) DURING ROUTINE 50 HRS INSPECTION,  A CRACK WAS FOUND ON MAIN ROTOR LAG DAMPER PISTON.  LAG DAMPER REPLACED IAW AMP.

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