Started work on SB 13-12-19, Fuel Tank Attach Modification, . Separated the T-01220 into A and B doublers and deburred the edges. Drilled out rivets from the left side and right bottom of the tank to aid in the installation fo the doublers. Drilled out rivet from the T-1205 Fwd Tank Bracket where the Doublers will attach from the inside of the tank. Several of the rivets are Cherry Max rivets and they were not easy to remove. Even with new drill bits drilling them out was slow. Removed the cured tank sealant from the inside of the tank. There is still more sealant to remove for the doublers to fit into position but will do at another time.
