Apparently there is concern that using the torque wrench on the other side might result in under-torquing because the bolt could be pinched and would resist turning thereby giving a faults high reading. That is what I have heard.
I am thinking of making an inspection hole below the balance weights(similar to the aileron belcrank access hole). This can be useful for inspections and for increasing the weight in case of a paint job.
Can I do this without compromising the integrety of the wing?
If anyone accidentally damages any of the holes that uses AD6 rivets here is a company that sell and stocks most sizes of AD8-XX rivets. Most places have a very limited selection of AD8-XX rivets. www.hansonrivet.com
$17.00 per pound.
Actually there are oversize rivets (drill a #5 hole), going to a 1/4" rivet might not leave good E.D. plus they are hard to shoot.
oversize rivets are NAS1242ADX_X and are available through ECAS East Coast Aircraft Supply http://www.ecasinc.com/
You can't use a torque value for torquing a bolt head. You shouldn't tighten the bolt head, only the nut. The bolt has drag in the bolt hole and it can't really be determined. The wing bolts should be a light drive fit and the torque to rotate them is unknown and variable. They shouldn't be turned anyway. Just say "no" to turning the bolt.
Mack----- Try a tool called a "torque extender" to torque in that tight area. I use torque extenders to torque the cylinder base nuts on my Franklin engine (in my old Stinson) and they are a life saver. You need to do some math to calculate the number to put into your torque wrench because you are changing the moment arm (length) of the wrench. Once you get the right setting on the torque wrench and have the right size extender on it, you can torque a nut in the darndest places.
I think, with a torque extender on a click-stop torque wrench, you could do that upper nut from inside the seat pan through the existing seat pan access panel. You will need a click-stop type because you will need to feel and hear the wrench as it reaches the setting, you will not be able to view a dial inside that space. There are also electronic beeping and vibrating torque wrenches now, come to think of it, but I like my click-stop units, simple, effective, no batteries to run down.
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