# SDR 20000331SH025

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 6, 2000
- Submitted: March 31, 2000
- Operation: General aviation
- Aircraft: N421CH
- Make and model: Cessna 421
- Registry model: [Cessna 421](https://openairdocs.org/model/cessna-421) (OpenAirDocs)
- Aircraft serial: 4210176
- Engine: Cont GTSIO520N
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Stud
- Condition: Failed
- Location: Nr 5 Cylinder
- Part time: 628 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/20000331SH025

## Discrepancy

DURING INSPECTION OF OIL LEAK, FOUND NR 5 CYLINDER BASE FRONT LOWER MOUNT STUD BROKEN.  POSSIBLY, THE STUD WAS HARD AND BROKE UNDER STRESS.  (X)

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