# SDR 3D9A20141206003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 28, 2014
- Submitted: December 6, 2014
- Operation: Air carrier
- Aircraft: N401DC
- Make and model: Bolkms BK117B2
- Aircraft serial: 7101
- Aircraft time: 7,753 hours, 21,800 cycles
- System (JASC): [6320 · Main Rotor Gearbox](https://openairdocs.org/jasc/6320)
- Part: Fitting
- Condition: Corroded
- Location: Transmission
- Part time: 7,588 hours
- Component: Transmission
- Component part number: 1171200501
- 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/3D9A20141206003

## Discrepancy

CORROSION FOUND UNDER RT LOWER TORQUE MOUNT FITTING ON MAIN TRANSMISSION CASE.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.