# SDR 96ZZZX4742

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 6, 1996
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: N105AK
- Make and model: Cessna 404CESSNA
- Aircraft serial: 40400833
- Engine: Cont GTSIO520M
- System (JASC): [8530 · Reciprocating Engine Cylinder Section](https://openairdocs.org/jasc/8530)
- Part: Rocker Boss
- Condition: Failed
- Location: Nr 3 Cyl Exh
- Stage of operation: NR
- Nature of condition: E, R, K
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/96ZZZX4742

## Discrepancy

ROCKER BOSS FAILED (CRACKED) ON EXHAUST SIDE ON CYLINDER NR 3.  ROCKER SHAFT PUNCHED THROUGH VALVE COVER.  INSPECTED MAGNETO DRIVE COUPLING PER SB M90-11, FOUND OK.

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