# SDR ALG2006F00021

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 30, 2005
- Submitted: February 8, 2006
- Operation: Air carrier
- Aircraft: [N436AL](https://openairdocs.org/aircraft/N436AL), registered now
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 53069
- Engine: Allsn 250C47B
- System (JASC): [6710 · Main Rotor Control](https://openairdocs.org/jasc/6710)
- Part: Bearing
- Part number: 406010432101
- Part serial: TIFS67
- Condition: Worn
- Location: Antidrv Link Brg
- Stage of operation: CR
- How discovered: O
- Nature of condition: E
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ALG2006F00021

## Discrepancy

IN CRUISE FLIGHT, FELT BUMP IN AIRFRAME, ALL INSTRUMENTS INDICATED NORMAL.  AFTER DESCENDING TO 500 FT, PROBLEM REPEATED.  AFTER LANDING, NOTIFIED MAINTENANCE.  ANTI-DRIVE LINK BEARINGS WORN.  REMOVED AND REPLACED ANTI-DRIVE LINK.  (K)

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