Began fabrication of a mounting shelf for the SV-ARINC429 interface.
Cut the shelf flat pattern to size and bent the forward flange to 90 degrees. Match drilled the forward flange to two of the predrilled #19 holes in the flange of the forward mid cabin cross member.
Match drilled the shelf to the SV-ARINC429.
Drilled mounting holes through the aft edge of the shelf and the aft mid cabin cross member.
Drilled the #40 holes for nut plates and countersank them.