# SDR 99ZZZX4070

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 2, 1999
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N6473D](https://openairdocs.org/aircraft/N6473D), registered now
- Make and model: Cessna 172N
- Registry model: [Cessna 172N](https://openairdocs.org/model/cessna-172n) (OpenAirDocs)
- Aircraft serial: 17272822
- Engine: Lyc O320H2AD
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Lifter
- Part number: LW16812
- Condition: Damaged
- Location: Nr 2 Cylinder
- Part time: 118 hours
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99ZZZX4070

## Discrepancy

DURING REPAIR OF CYLINDER NR 2, FOUND HYDRAULIC LIFTER OF INLET VALVE CYLINDERS NR 2 AND 1 DAMAGED.  SPALLING OF SURFACE RUNNING ON THE CAMSHAFT.  CAMSHAFT COVER INLET VALVE CYLINDERS NR 2 AND 1 HAD MATERIAL DAMAGED.  ENGINE TSO 118 HOURS.

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