A follow-up to the conversation concerning miss-alignment with the trim motor assembly with respect to the lower fuselage mounting tabs for those who follow. After emailing with the factory elongating the holes is NOT a good option and in retrospect I should have investigated the problem more before I slightly elongated the holes in the mounting tabs in opposite directions. This did result in squaring the bolt to the fuselage but there might have been better approaches. And while statically this approach seems fine I really began to question long-term dynamic forces and the suitability of the above approach.
So to remedy the situation at the direction of the factory I’m going to fabricate mirror images of the tabs and bond and rivet them to the inside of the mounting tabs made from .063" 4130. This maximizes surface area and avoids the welds. .063" is the thickness of the AN960-10 washers installed and is the thickness of the tabs. To align the holes in the bonded pieces I plan to install the elevator trim assembly and bond washers to the outside surfaces of the mounting tabs first using the bolt to align the washers. Once the Hysol dries the washers will be guides for drilling the holes to the proper angle so the assembly will be square with the elevator.
Any thoughts or ideas to improve this process would be welcomed.
Thanks, Greg