# SDR 0021

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 28, 2003
- Submitted: August 28, 2003
- Operation: Air carrier
- Aircraft: N203LG
- Make and model: Beech B200
- Registry model: [Beech B200](https://openairdocs.org/model/beech-b200) (OpenAirDocs)
- Aircraft serial: BB926
- Aircraft time: 6,275 hours, 5,434 cycles
- System (JASC): [5751 · Ailerons](https://openairdocs.org/jasc/5751)
- Part: Sprocket
- Part number: 1005241201
- Condition: Defective
- Location: Aileron
- Part time: 6,275 hours, 5,434 cycles
- 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/0021

## Discrepancy

DURING COMPLIANCE, THE AILERON SPROCKET WAS FOUND TO HAVE A POSSIBLE DEFECT.  DOING A VISUAL INSPECTION BETWEEN THE TWO GEARS OF THE AILERON SPROCKET, ON THE LARGE GEAR NEAR THE SHAFT AREA, IT APPEARS THE WELDING MAY NOT HAVE BEEN COMPLETED IN A SMALL AREA, APPROXIMATELY .2500 INCH LONG, OR A CORROSION PIT HAS STARTED.  THE DEFECT LOOKS LIKE A CORROSION TYPE OF PIT.  THERE WAS NO VISUAL EVIDENCE OF A CRACK.  NO NDT WAS PERFORMED ON THE UNIT AT THIS TIME.  UNIT WAS CHANGED AS A PRECAUTION.

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