# SDR 95ZZZX5759

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 21, 1995
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N639MA](https://openairdocs.org/aircraft/N639MA), registered now
- Make and model: Mooney M20C
- Registry model: [Mooney M20C](https://openairdocs.org/model/mooney-m20c) (OpenAirDocs)
- Aircraft serial: 2893
- Engine: Lyc O360A1D
- System (JASC): [8520 · Reciprocating Engine Power Section](https://openairdocs.org/jasc/8520)
- Part: Crankcase
- Part number: LW11026
- Condition: Cracked
- Location: Rt Half
- Part time: 2,703 hours
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/95ZZZX5759

## Discrepancy

RIGHT CRANKCASE HALF FROM PARTING SURFACE LOWER NR 3 BOLT HOLE HAS 1 EACH .25 INCH CRACK FROM BOLT HOLE TO PARTING SURFACE, AND 1 EACH 1.850 INCH CRACK FROM BOLT HOLE INTO CASE WEBBING.  SUBMITTER CANNOT DETERMINE THE CAUSE OF CRACK.  NOTE:  THE PROPELLER GOVERNOR OIL LINE AND THE GENERATOR HAD TO BE REMOVED BEFORE THE CRACK AREA WAS VISIBLE.

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