(April 16, 2019, 9:06 AM EDT) -- FORT WORTH, Texas — A motion to dismiss filed by defendants in a class action lawsuit alleging that American Airlines Inc. violated the Employee Retirement Income Security Act by using an outdated mortality table from 1984 to estimate the average lifespan of pension plan participants must be denied because ERISA requires the use of reasonable actuarial assumptions, the plaintiffs maintain in an April 4 opposition to the motion to dismiss filed in Texas federal court (Olga Martinez Torres, et al. v. American Airlines Inc., et al., No. 18-983, N.D. Texas)....