# SDR CA000309003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 1, 2000
- Submitted: April 14, 2000
- Operation: Air carrier
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- System (JASC): [6510 · Tail Rotor Drive Shaft](https://openairdocs.org/jasc/6510)
- Part: Bearing
- Part number: 407340339103
- Condition: Rough
- Location: Tail Rotor Drive
- Part time: 331 hours
- Component: Tail Boom, Bell, 407030800101
- 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/CA000309003

## Discrepancy

(CAN) ON SHUTDOWN, PILOT REPORTED GROWLING NOISE COMING FROM REAR OF ROTORCRAFT.  IT WAS DISCOVERED THAT THE 2ND T/R DRIVESHAFT BEARING AFT OF THE OIL COOLER WAS DEFECTIVE.  BEARING REPLACED.

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