The nomination of Leslie F. Seidman, a former chairman of the Financial Accounting Standards Board, came after GE unveiled a $6 billion (4.27 billion pounds) charge related to its insurance businesses and, on Friday, said it would restate results for 2016 and 2017 because of accounting changes. The other two appointees are Thomas Horton, who oversaw the restructuring and merger of American Airlines with US Airways, and Lawrence Culp Jr., who as former CEO of Danaher Corp transformed the company from a manufacturer into a science and technology firm.