# SDR 20000724SH005

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 5, 2000
- Submitted: July 24, 2000
- Operation: General aviation
- Aircraft: [N733FF](https://openairdocs.org/aircraft/N733FF), registered now
- Make and model: Cessna 172N
- Registry model: [Cessna 172N](https://openairdocs.org/model/cessna-172n) (OpenAirDocs)
- Aircraft serial: 17268256
- Engine: Lyc O320H2AD
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Valve
- Condition: Seized
- Location: Exhaust
- Part time: 5,635 hours
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/20000724SH005

## Discrepancy

NR 1 CYLINDER EXHAUST VALVE SEIZED IN GUIDE, DESTROYED PISTON.  RESULTANT OIL SYSTEM CONTAMINATION HUNG NR 2 CYLINDER INTAKE LIFTER, BROKE CONNECTIN ROD, AND FAILED CASE.  LYC MANDITORY SB NR 388B DATED MAY 13, 1992, ADDRESSES SCHEDULED VALVE TO GUIDE CLEARANCE INSPECTIONS.  C/W THIS INSPECTION MAY PRECLUDE POTENTIAL SIMILAR INCIDENTS.  (X)

---
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.