# SDR CA090729001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 22, 2009
- Submitted: October 23, 2009
- Operation: General aviation
- Make and model: Robsin R44RAVENII
- Aircraft time: 1,352 hours
- Engine: Lyc IO540AE1A5
- System (JASC): [7497 · Ignition System Wiring](https://openairdocs.org/jasc/7497)
- Part: Wire Harness
- Condition: Chafed
- Location: Magneto
- Component: Magneto, 10600646201
- Component part number: E05EA102
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA090729001

## Discrepancy

MAGNETO WAS REMOVED AFTER ENGINE OVERSPEED, DURING TEARDOWN FOR OVERHAUL REVEALED TACH HARNESS LEADS HAD CHAFED THRU THE OPPOSIT PIN ON THE TACH POINTS.

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