Bit of a technique question here. While doing some assembly of my elevators I noticed I countersinked the wrong side of the aft spar (9-8 step 2). So now instead of the top having a smooth surface for the trim tab hinge it's dimpled, and the bottom is smooth. This is only on the left elevator, did the right one correct.
I can't think of any issues of the bottom part having countersinked vs dimples, but I obviously need to fix the top for it to be smooth. One option is to flatten the dimples with a squeezer and then countersink. The other is to grind the back side of the dimples flat. My concern with flattening is will it weaken the metal? Then my concern with grinding is it will remove material and possibly make the hole larger.
Either way the goal is to have a flat surface to attach the hinge.
I can't think of any issues of the bottom part having countersinked vs dimples, but I obviously need to fix the top for it to be smooth. One option is to flatten the dimples with a squeezer and then countersink. The other is to grind the back side of the dimples flat. My concern with flattening is will it weaken the metal? Then my concern with grinding is it will remove material and possibly make the hole larger.
Either way the goal is to have a flat surface to attach the hinge.