The MGA With An Attitude
Autopsy Of A FAILED ROTOR - IG-111D
On 12 September 2012, Steve Gyles in Church Crookham, Hants, England, wrote:
I have just taken the metal spring plate out of the rotor.
![](pics/rotor14s.jpg)
"The plastic behind it was soft and burnt. Looks like it has been shorting through the rivet.
Thought you might like to see the evidence of arcing I found inside the rotor".
"I extracted the arm and rivet and found firm evidence of arcing on the rivet (ignore the bright silver marks on the arm. That is where I levered it out).
![](pics/rotor16s.jpg)
"I cut the rotor in half. The distance from the rivet to the spring retaining plate is 4mm. So, the electricity penetrated this distance of plastic. Seems a lot.
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