# SDR 99ZZZX517

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 3, 1998
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N497AL](https://openairdocs.org/aircraft/N497AL), registered now
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 53172
- System (JASC): [6220 · Main Rotor Head](https://openairdocs.org/jasc/6220)
- Part: Pitch Horn
- Part number: 407010103101
- Condition: Corroded
- Location: Main Rotor
- Part time: 1,252 hours
- Component: 407010100111
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99ZZZX517

## Discrepancy

DISSIMILAR METAL CAUSED CORROSION UNDER BUMPER PLATE AND  DOWEL PIN HOLES.

---
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.