Tuesday, December 28, 2021

Installed the AN837-4D 45deg elbow at the gear weldments - 1.5 hours

 One task that needs to get done is to install the AN837-4D 45deg elbow at the gear weldments. One of the parts of this task that I have not completed yet was drilling the hole in the F-772 forward bottom skin. The plans have you open up the pilot hole to 5/8" diameter however I purposely did not open it up all the way. The reason why is that I wanted to make sure that the hole was perfectly aligned with the hole in the weldment. The only way to make 100% sure was to actually install the weldments (and bolt them).

Now that it is done, time to center the hole for the AN fitting and open to 5/8" diameter. So after some work with the file and the dremmel I had the opening at 5/8" and perfectly centered.