SEATTLE — Wreckage of a floatplane that crashed into Mutiny Bay last week has been located on the seafloor, after the depth and motion of the water hid the wreckage for several days, according to the National Transportation Safety Board. A “large section” similar in length and width to the plane was located Saturday by sonar about 190 feet below the surface of Puget Sound just off Whidbey Island, according to spokesperson Jennifer Gabris. Initially, only small pieces of debris, some personal items and one body, identified as 29-year-old Gabby Hanna, were recovered from the Sept. 4 crash that k…