# SDR 9EKA2015033013

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 27, 2015
- Submitted: March 30, 2015
- Operation: Air carrier
- Aircraft: [N214EB](https://openairdocs.org/aircraft/N214EB), registered now
- Make and model: Bell 214ST
- Registry model: [Bell 214ST](https://openairdocs.org/model/bell-214st) (OpenAirDocs)
- Aircraft serial: 28130
- Aircraft time: 8,881 hours
- System (JASC): [6320 · Main Rotor Gearbox](https://openairdocs.org/jasc/6320)
- Part: Case
- Part number: 214040361101
- Condition: Cracked
- Location: Transmission
- Component: Transmission, Bell
- Component part number: 214040002119FM
- Stage of operation: IN
- How discovered: O
- Nature of condition: K
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/9EKA2015033013

## Discrepancy

DURING PREFLIGHT OIL WAS NOTICED ON THE UPPER TRANSMISSION CASE.  UPON FURTHER INVESTIGATION, PAINT WAS BUBBLED ON RING GEAR CASE.  CLEANED PAINT & DYE PENETRANT WAS USED REVEALING A SUSPECTED CRACK.  ACFT WAS RUN AT 100% NR & OIL WAS NOTICED COMING FROM A CRACK IN THE TRANSMISSION RING GEAR CASE.

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