# SDR 2004FA0000721

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 15, 2004
- Submitted: September 20, 2004
- Operation: General aviation
- Aircraft: N529FB
- Make and model: Hughes 500N
- Aircraft serial: LN0098
- Engine: Allsn 250C20
- System (JASC): [6700 · Rotorcraft Flight Control](https://openairdocs.org/jasc/6700)
- Part: Mount
- Condition: Out Of Position
- Location: Notar Fan
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2004FA0000721

## Discrepancy

AIRCRAFT FOUND TO HAVE CONTACT WITH FAN CONTROL ROD AND FAN DRIVESHAFT, WHICH MAY HAVE BEEN THE CAUSE OF HIGH VIBRATION IN AIRFRAME.  MFG CALLED TO CHECK THE ALIGNMENT OF THE FAN MOUNT.  SECOND TIME, HAD RUB WITH DRIVESHAFT SINCE AIRCRAFT WAS NEW.

---
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.