# SDR 97ZZZX2068

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 2, 1997
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N6350X
- Make and model: Cessna 402B
- Registry model: [Cessna 402B](https://openairdocs.org/model/cessna-402b) (OpenAirDocs)
- Aircraft serial: 402B1317
- Engine: Cont TSIO520E
- System (JASC): [8520 · Reciprocating Engine Power Section](https://openairdocs.org/jasc/8520)
- Part: Stud
- Part number: 6461401
- Condition: Broken
- Location: Nr 1 Cyl Pad
- Component: 652539
- Stage of operation: CR
- Nature of condition: K
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97ZZZX2068

## Discrepancy

DURING THE COURSE OF A NORMAL FLIGHT, PILOT NOTICED OIL LEAK ON LEFT ENGINE.  AFTER FLIGHT, REMOVED ENGINE COWLING AND SAW 5 CYLINDER STUDS HAD BROKEN ON THE NR 1 CYLINDER.  ON ENGINES OPERATED ON 1600 TBO'S, SUSPECT TIME IN SERVICE IS THE MAIN CAUSE FOR BREAKAGE.  PLEASE NOTE:  THIS IS NOT A 7TH STUD TYPE CASE, HOWEVER, IT IS A 'HEAVY' CASE.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.