# SDR 97ZZZX1248

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 20, 1997
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N999AN](https://openairdocs.org/aircraft/N999AN), registered now
- Make and model: Beech 58
- Registry model: [Beech 58](https://openairdocs.org/model/beech-58) (OpenAirDocs)
- Aircraft serial: TH924
- Engine: Cont IO520C
- System (JASC): [8520 · Reciprocating Engine Power Section](https://openairdocs.org/jasc/8520)
- Part: Crankcase
- Condition: Cracked
- Location: Nr 6 Cyl Stud
- 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/97ZZZX1248

## Discrepancy

DURING OIL CHANGE, FOUND 1 INCH CRACK EXTENDING FROM CYLINDER NR 6 UPPER REAR STUD.  AD 77-13-22 PARA(A) ADDRESSES THIS SUBJECT, BUT IS NOT INCLUDED IN THE SERIAL NUMBER REQUIREMENT LIST.

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