Well in all my years of working for a airline I have never and I mean NEVER had an engineer send down a repair or modification that called out the right length fasteners. The bolts are always to short and the rivets to long. I'm not saying you friend doesn't know what he is doing but there always seems to be a break down in communication. How did he determine the correct length of fastener? By a math calculation based off the drawing or did he actually put the pieces together and use a grip scale? If he performed the math calculation as an engineer would, this is almost always where the mistakes are made, it is much easier and more accurate to use the grip scale rather than doing math and then converting 3/32, 3 times the thickest sheet, add this subtract that yada, yada, yada. If it grip to a -10, then you have a 99% chance of being right the first time.
Chris Theroux Gilbert, AZ > The Wick's Warehouse Supervisor was sending him > bolts > > based on Total Length, NOT Grip Length. And then > had > > told my friend that that's how they have been > doing it > > for the last 30 years. >
