Zenith Aircraft Builders and Flyers
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Best way to recover from this mistake
Working on mounting my horizontal stab on a 750 STOL. Drilling out 75F2-5 Horizontal tail attachment gussets that I had to fabricate as the supplied predrilled ones had the pilot holes in the wrong spots. Long story short, I inadvertently drilled into 75F2-4, the horizontal tail frame in the fuselage right at its bend. I drilled the frame’s rivets out, removed it, and ordered a new one that arrived today. The problem is, I still need to put a rivet in that spot where there’s a hole in the skin. So I cleaned up the hole/gouge in the part leaving space for the tail of a rivet. Should I use the cleaned up part, the new part and leave an empty A-5 size hole in the skin, or the new part and research a way to patch the skin?
The before and after pictures attached should explain better.
Thanks
Keith
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IMG_5998.jpeg, 2 MB -
IMG_6003.jpeg, 2 MB
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IMG_6004.jpeg, 1.9 MB
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Replies to This Discussion
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Permalink Reply by Michael Barrie on
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Hi Keith,
Without researching the part numbers I assume the miss drilled hole is in your stabs main spar? if this is the case, i would simply leave the hole as it is and put a dummy rivet in your skin. I'm not sure if I am interpreting the error correctly or not. There wont be any structural loss with a hole like this, and a very minor cosmetic blemish with the out of place rivet. At the end of the day 1 out of 100000 rivets out of line isn't a big deal to me. That's just my .02
Mike.
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Permalink Reply by Ralph Sanson on
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I would use the new part and fill the hole in the skin with epoxy, I have used adhesive aluminum tape on the inside in the past to mask places where a fitting once was installed, where there is no structural issue.
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