Sorry guys my system glitched. I sent the e-mail too soon. An adjustable reamer is available at most machining supply places. The bolts may be slightly different, but you can buy a few extra to get some of the same size. Get some jet nuts or be sure you locktite or safety wire the nuts too.

Bill Jepson

Just another view on this; custom fitting and reaming each of 20 holes individually for the bolts may work for a few individual fixes, but is certainly not a production solution.  Nor do I think safety wiring the 20 bolts (which are visible) is necessary or practical where metal locknuts would be perfectly reliable. Cold forming steel rivets are not as strong as AN bolts, not definitely more easily adapted to doing very many of these parts.

But let’s not get ahead of ourselves.  Is this an issue with any urgency?  Does this issue apply to more than a few cases of 3-rotor and turbocharged 2 rotors? Tracy has what – more than 800 hours on one of these drives with aluminum rivets on a 13B and it’s still good, so is it a matter of the number of hours? How many other high hour drives are there that should be checked.  How many hours are on 20B and 13B turbo installations.  And what is the best fix?  Certainly Tracy has to have some time to weigh in on that.

Al G