This report discusses the Air Force's planned procurement of 350 new Advanced Pilot Training (APT T-X) aircraft and 46 Ground Based Training Systems (GBTS) at a cost valued at roughly $1.5 billion for the Research, Design, Test, and Evaluation phase of the program and estimated at $18 billion in future procurement costs. The APT T-X acquisition strategy poses potential oversight issues for Congress, including the following: Is the number of planned aircraft purchases sufficient? Given the reported pilot shortage, should the procurement be accelerated? What effects do increased F-35A & KC-46 purchases, along with development of the new Long Range Strike Bomber, B-21, have on the USAF budget and the feasibility of an additional Major Defense Acquisition Program? These questions and the Air Force's FY 2017 appropriations requests' for the program are addressed in this report.