We've studied that incident in as much detail as we can find. The airplane was a 10E and it seems to have been salvaged. It floated for only eight minutes but it didn't have the long-range fuel tanks NR16020 had. Estimating weights, buoyancy, venting, etc. as best we can, we calculate that Earhart's Electra, washed off the reef leaving behind the Bevington Object, would probably float for about 18 minutes.