# SDR WS9R10FA0000467

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 21, 2010
- Submitted: May 14, 2010
- Operation: General aviation
- Filed by: [Western Skyways Inc, repair station WS9R575J](https://openairdocs.org/faa-repair-station/WS9R575J/western-skyways-inc.md) (OpenAirDocs)
- System (JASC): [8500 · Engine (Reciprocating)](https://openairdocs.org/jasc/8500)
- Part: Thrust Washer
- Condition: Mismanufactured
- Location: Engine
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/WS9R10FA0000467

## Discrepancy

(WS9R) THE COMPONENT IS MFG WITH IMPROPER TOLERANCES.  HAVE DISCOVERED THIS PROBLEM DURING ENGINE O/H.  THE THICKNESS OF THIS COMPONENT VARIES FROM .092-.097 INCHES.  THIS THRUST WASHER IS FOUND IN MAIN BEARING SET FOR THESE ENGINES.  THIS ISSUE MAKES OBTAINING PROPER CRANKSHAFT THRUST CLEARANCE NEARLY IMPOSSIBLE, IAW MFG MM.

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