Wire connections must be made mechanically sound before they are soldered.
Solder alone does not provide sufficient strength to prevent breakage.
Joining surfaces of connections to be soldered must be clean and bright.
If a separate flux is used, it should conform to Military Specification
MIL-F4995, Type I, rosin-alcohol flux, and should be brushed onto the joint before soldering.
If a flux-core solder is used, it should always be rosincore electrical solder.
If an uncored solder is used, it should be a leadtin solder conforming to Federal
Wires should always be heated to the point at which the solder will melt
completely and flow into all parts of the joint.
Excessive build-up of solder "gobs" on the joint should be avoided or removed.
REMOVAL AND REPLACEMENT OF RIVETS.
From the 24P Repair Parts and Special Tools List, identify the size of the rivet
Select drill bit one size smaller in diameter than the rivet to be removed.
Position the drill bit on the center of the rivet head and drill down slightly below
the riveted surface.
Using a center punch, snap the rivet head off and punch the remaining rivet
material through the hole.
Select the proper replacement rivet and insert in the rivet clinching tool.
Place the rivet in the hole and maintain the rivet shaft perpendicular to the
material being riveted.
Apply a slow, even pressure on the clinching tool until the rivet is set.
Make sure rivet nuts or rivet is snug and not free to rotate.