Removed called out rivet, aligned stiffener, and match drilled to F-1278 tailcone top skin. Removed stiffener and deburred holes. Scuffed stiffener with Scotch Brite pad, cleaned with Acetone, and primed with A-702 Zinc Phosphate primer. Riveted stiffener to top skin. (page 42C-09) Page 42C-09 IS COMPLETE
Installed ADAHRS to brackets, then connected pitot and static lines to ADAHRS via nylon fittings. I could only find one straight fitting so used one straight (static line) and one elbow (pitot line) fitting. Connected OAT wiring to back of ADAHRS. Installed backshell on harness and connected to the back of ADAHRS. (page 42C-10) Page 42C-10 IS COMPLETE
