Mailing List flyrotary@lancaironline.net Message #67961
From: Finn Lassen finn.lassen@verizon.net <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] EC2 "A" Computer failure
Date: Sun, 21 Dec 2025 19:53:29 -0500
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
One difference is that the A controller has the temp sensor. At one point there was a revision that made it impervious to shorted sensor. Don't remember what happened when it shorted prior to that revision.

Finn

On 12/21/2025 5:06 PM, Doug Lomheim rv9flyer13b@gmail.com wrote:
Have any of you ever lost the “A” side of EC2?  I went to start the R7A w/Renesis yesterday and it wouldn’t fire right off as before.  Switched to the “B” side and it fired right up.  EM2 rpm was alternating between the actual RPM and NOP displaying.  

Will of course have to begin troubleshooting this outage, but wondered if any had seen this before, and where the fault lied?  

thx.

Doug 

RV-7A w/Renesis 13B (Dennis Haverlah build w/1019 hrs now!)
RV-9A w/13B (7 hrs. of ground runs) 


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