# SDR CHIR201502021856

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 28, 2015
- Submitted: February 2, 2015
- Operation: General aviation
- Aircraft: [N188CH](https://openairdocs.org/aircraft/N188CH), registered now
- Make and model: Boeing 1072
- Aircraft serial: 107
- Aircraft time: 68,134 hours
- Engine: Ge CT581402
- System (JASC): [6210 · Main Rotor Blades](https://openairdocs.org/jasc/6210)
- Part: Gear
- Part number: 107D22904
- Part serial: TA127
- Condition: Cracked
- Location: Accessory Drive
- Part time: 4,772 hours
- Stage of operation: IN
- How discovered: M
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CHIR201502021856

## Discrepancy

INDICATION FOUND AROUND THE BASE OF THE BEARING JOURNAL, CLOSEST TO THE GEAR TEETH THAT ARE DRIVEN BY THE ACCESSORY DRIVE GEAR DURING MPI REQUIRED FOR O/H OF COMPONENT.  PART HAS BEEN SENT OUT FOR FURTHER TESTING SINCE INDICATION SEEMS ISOLATED TO THE OUTER SURFACE.

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