Electric trim blowing fuse

[Champ]

I’ve got the same problem with aileron trim. Started while doing the annual. Is it true that 70% of maintenance is caused by 70% of maintenance? Trouble shooting now. Ray Allen trim servo checked out OK when I unplugged it and hot wired it through a 1 amp fuse. Deeper dive tomorrow.

[SARLDO]

Originally Posted by Champ

Is it true that 70% of maintenance is caused by 70% of maintenance?

Sounds about right. A great deal of corrective maintenance is required due to errors made performing preventative maintenance. Of course, the downside of skipping the preventative maintenance is causing a condition that is beyond the scope of maintenance.

Round and round we go……

[homeap]

I chased down all the wires and disconnected the servo and still could not locate a short. I talked to Tony at Vans Aircraft RV 12 electrical expert and he indicated he thought it was in the module control box. I have sent that off for repair. Let’s hope that’s it!
Thank you all for your input, it has been invaluable!

Russ

[Champ]

Finally determined the Ray Allen RP3 trim indicator in my aileron trim circuit was causing its breaker to trip, so, I removed it opened it up to check for any obvious defects - found none. When I talked to Ray Allen about this they didn't seem to surprised and offered to send me their RP4 at half price - the RP3 is no longer made. The panel cut out will have to be elongated about 80 thou (file time) but at least mounting holes are the same. Wondering if I should replace the elevator trim indicator at the same time in case its days are numbered to.