# SDR 2001FA0000163

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 3, 2001
- Submitted: August 3, 2001
- Operation: General aviation
- Aircraft: [N53WC](https://openairdocs.org/aircraft/N53WC), registered now
- Make and model: Waco YMF
- Registry model: [Waco YMF](https://openairdocs.org/model/waco-ymf) (OpenAirDocs)
- Aircraft serial: FSC062
- Engine: Jacobp R755*
- System (JASC): [8520 · Reciprocating Engine Power Section](https://openairdocs.org/jasc/8520)
- Part: Stud
- Part number: 4109
- Condition: Broken
- Location: Nr 4 Cylinder
- Part time: 252 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/2001FA0000163

## Discrepancy

FOUND BROKEN CYLINDER BASE STUD ON NR 4 CYLINDER.  AFTER REMOVING BROKEN STUD, FOUND TWO OTHERS BENT,  SENT STUDS FOR EVALUATION TO SEE IF THEY MET DESIGN INTENT.  THE STUDS DID NOT MEET SPECIFICATIONS.

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