Major Olivia Elliott, a former T-38 instructor, now a 303rd Fighter Squadron A-10 Thunderbolt II pilot, has been accepted to Test Pilot School where she will learn to fly more than 20 different aircraft. TPS, she said, is a step toward her ultimate goal - becoming an astronaut. The 303rd FS in part of the 442nd Fighter Wing, a reserve unit at Whiteman Air Force Base, Mo.