# SDR JYDR20170324075

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 23, 2017
- Submitted: March 30, 2017
- Operation: General aviation
- Make and model: Skrsky S64E
- Aircraft serial: 64003
- Aircraft time: 44,567 hours, 15,217 cycles
- System (JASC): [6320 · Main Rotor Gearbox](https://openairdocs.org/jasc/6320)
- Part: Gear
- Part number: 153520057006
- Part serial: MULTIPLE
- Condition: Spalled
- Location: Main Gearbox
- Part time: 1,300 hours
- Component: Main Gearbox, Skrsky, 065
- Component part number: 643520400065
- Stage of operation: UK
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/JYDR20170324075

## Discrepancy

DURING DISASSEMBLY FOR MINI OVERHAUL LARGE AMOUNTS OF FERROUS MATERIAL WAS NOTICED IN OIL SUMP. FURTHER TEARDOWN REVEALED 2ND STAGE PLANETARY GEARS WERE HEAVILY SPALLED.

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