# SDR 98ZZZX554

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 14, 1998
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N23KM](https://openairdocs.org/aircraft/N23KM), registered now
- Make and model: Gulstm 500B
- Aircraft serial: 143153
- Engine: Lyc IO540B1A5
- System (JASC): [8520 · Reciprocating Engine Power Section](https://openairdocs.org/jasc/8520)
- Part: Stud
- Part number: 66734
- Condition: Failed
- Location: Nr 5 Cylinder
- Stage of operation: NR
- Nature of condition: E, R
- Precautionary procedure: E, A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/98ZZZX554

## Discrepancy

NR 5 CYLINDER THROUGH-STUD BROKE CAUSING STUDS 56-15 TO BREAK.  CYLINDER BECAME LOOSE.  ENGINE RAN ROUGH.  ENGINE SHUT DOWN AND SAFE LANDING MADE.  SUBMITTER SUGGESTED A POSSIBLE CAUSE AS OVERTORQUE OF CYLINDER HOLD-DOWN STUDS.

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