# SDR 2012FA0000661

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 27, 2012
- Submitted: September 27, 2012
- Operation: General aviation
- Aircraft: [N4305H](https://openairdocs.org/aircraft/N4305H), registered now
- Make and model: Mooney M20J
- Registry model: [Mooney M20J](https://openairdocs.org/model/mooney-m20j) (OpenAirDocs)
- Aircraft serial: 240788
- Aircraft time: 4,105 hours
- Engine: Lyc IO360A3B6D
- Engine time: 3,026 hours
- System (JASC): [7414 · Magneto/Distributor](https://openairdocs.org/jasc/7414)
- Part: Gasket
- Condition: Unknown
- Location: Magneto
- Part time: 1,550 hours
- 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/2012FA0000661

## Discrepancy

ENGINE STARTED TO LEAK OIL.  FOUND MAGNETO LOOSE TO ENGINE BUT HOLD DOWN BLOCKS WERE TIGHT TO THE ENGINE.  THIS CAUSED DAMAGE TO THE MAGETO CASE.  MEASURED A NEW GASKET AND ITS THICKNESS IS .034.  THE NEW GASKETS, ARE THINNER THAN USED,  WAS THE PROBLEM DUE TO THE HOLD DOWN BLOCKS NOT PROVIDING PROPER CLAMPING TENSION.

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