# SDR 20000718SH015

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 21, 2000
- Submitted: July 18, 2000
- Operation: General aviation
- Aircraft: [N577AL](https://openairdocs.org/aircraft/N577AL), registered now
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 53247
- System (JASC): [6320 · Main Rotor Gearbox](https://openairdocs.org/jasc/6320)
- Part: Transmission
- Part number: 407040006107
- Part serial: A259
- Condition: Corroded
- Location: Main Rotor
- Part time: 2,487 hours
- Component: Case Assy
- Component part number: 407040050101
- 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/20000718SH015

## Discrepancy

AT DISASSEMBLY FOR TRANSMISSIONS FIRST OVERHAUL, FOUND CORROSION IN BORE OF MOUNTING SPLINDLE.  CORROSION IN BORE OF CHIP DETECTOR ASSY.  CORROSION ON INPUT FLANGE.  (X)

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