Project: Mike     -     Entry

Jan 28, 2023 3.0 Work on electric elevator trim system and a screw up.... Category: Empennage
Started off my countersinking the holes for the nutplates. Somewhat delicate as there is not a lot of material to work with.

Unfortunately I thought I had a good handle on this trim installation, apparently not. Following my own hand written instructions, I got a little ahead of myself today and ended up drilling the wrong holes in the trim servo bracket plate. For some reason I initially thought that plate went on the inside of the skin. It goes on the outside of course so I dorked this piece up right off the bat which kinda derailed my progress for the day.

Fortunately for once, this is an easy part to reproduce and there was a piece of .032 scrap that come with the empennage kit that was the perfect size. So a little tracing, some cutting on the band saw and some edge deburring and shaping and I had a new part ready to continue. However I messed this new part up again by using the old part to match drill the screw holes. What I should have done is clamp the cover plate in place and match drill the screw holes from the backside using the already installed piece as the guide. So I realized pretty quickly that after spending about 30 minutes recreating this part from the scrap, that I had messed it up again by not match drilling the holes properly.

Round three...... So I made the part again, this time a little more carefully and back drilled the screw holes using the already installed piece as the guide. Unfortunately this used up all my free time for the day so it's all the further I managed to get.


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