# SDR YV3R2021062200466

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 27, 2021
- Submitted: June 22, 2021
- Operation: General aviation
- Filed by: [Robinson Helicopter Company Inc, repair station YV3R012M](https://openairdocs.org/faa-repair-station/YV3R012M/robinson-helicopter-company-inc.md) (OpenAirDocs)
- Aircraft: VH-BL
- Make and model: Robsin R22BETAII
- Aircraft serial: 4689
- Aircraft time: 2,501 hours
- Engine: Lyc O360J2A
- System (JASC): [6300 · Main Rotor Drive System](https://openairdocs.org/jasc/6300)
- Part: Sheave
- Part number: A4931
- Part serial: LOT142A
- Condition: Corroded
- Part time: 301 hours
- 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/YV3R2021062200466

## Discrepancy

CUSTOMER RETURNED LOWER SHEAVE P/N: A493-1.  AFTER ENGINEERING EVALUATION, CORROSION WAS FOUND UNDER PLATING.

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