Panther Sport Aircraft Forums

Posted: **Sat Aug 02, 2025 11:00 pm**

Posted: **Thu Jun 21, 2018 10:34 am**

Thanks for the info Paul!

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Posted: **Thu Jun 21, 2018 10:07 am**

You will need to measure the holes to determine what iversize bolt you need. There are 1/64" and 1/32" oversize fasteners available, called hi-loks. viewtopic.php?f=8&t=522&p=2717&hilit=Nas6603#p2727.
I am away from my data resources to give the number of the hi-loks.

If you can determine the size you need, then ream the hole to that size and verify the hole is round.

If it requires more than 1/32" oversize, recommend you place a trouble call with SPA. There are usually options to repai most problems like this.

Posted: **Wed Jun 20, 2018 10:45 pm**

Seeking advice if corrective action needs to be taken, when drilling my main spar specifically the holes that are for the close tolerance bolts....apparently my drill bit which I was keeping lubricated with boelube Had galling issues. Before I ran the actual 3/16 reamer through the holes I notice a little dark channel about 3/4 of the way down into the holes. Fast forward to when I disassembled to deburr, some of the holes are out of round slightly. This only happened on the thicker part of the spar (inboard section) and not in any of the holes where rivits were called for (different drill bit).

Do I need to reassemble and ream for a bigger bolt? Is it all scrap now? Or will it simply be okay?

Panther Sport Aircraft Forums

Out of round holes in main spar

Re: Out of round holes in main spar

Re: Out of round holes in main spar

Re: Out of round holes in main spar

Out of round holes in main spar