# SDR CA090605008

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 4, 2009
- Submitted: October 23, 2009
- Operation: General aviation
- Make and model: Robsin R44RAVENII
- Aircraft time: 520 hours
- Engine: Lyc IO540AE1A5
- System (JASC): [6510 · Tail Rotor Drive Shaft](https://openairdocs.org/jasc/6510)
- Part: Bearing
- Condition: Lack Of Lube
- Location: Shaft Hanger
- Part time: 749 hours
- Component: Drive Shaft
- Component part number: D1961
- Stage of operation: NR
- How discovered: 9
- Nature of condition: W, E
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA090605008

## Discrepancy

(CAN) PILOT REPORTED TO THE ENGINEER, HIGH FREQUENCY VIBRATION IN FLIGHT. A GRINDING NOISE WAS HEARD DURING SHUTDOWN WHILE THE BLADES WERE SLOWING.  TAIL ROTOR DRIVE SHAFT WAS REMOVED FOR INSP AND FOUND THE C172-1 HANGER BRG HAD NO LUBRICATION.  THERE WAS NO EVIDENCE OF EXCRETED LUBRICATION AROUND THE BRG SO PROBABLE CAUSE COULD HAVE BEEN A LACK OF LUBRICATION FROM THE FACTORY.

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