Began fuel sender calibration with assistance from Danny Foxx. Set empty points for each tank. Added five gallons to each side. Attempted to set second points on each tank; failed. Conferred with Jason Smith at Aerotronics. All data points for one tank should be established and saved before calibrating the next tank. Tanks will need to be defueled after first engine start. Raised tail, removed empennage stand and lowered tail to ground. Danny: 1 hr. Martin: 2 hrs
