註釋 The AFWCF earned revenue of $21.2 billion in fiscal year 2013 by, among other things, (1) repairing aircraft and engines; (2) selling inventory items (parts); and (3) providing air, land, and sea transportation. Cash generated from the sale of goods and services is used by the AFWCF to cover its expenses, such as paying employees. As requested, GAO reviewed issues related to AFWCF cash management. GAO's objectives were to determine to what extent (1) the AFWCF monthly cash balances were within the DOD minimum and maximum cash requirements for fiscal years 2009 through 2013 and (2) the AFWCF projected monthly cash balances were within the minimum and maximum cash requirements for fiscal years 2014 and 2015 and if not why. To address these objectives, GAO reviewed relevant DOD cash management guidance, analyzed AFWCF actual and projected cash balances and related data, and interviewed Air Force and United States Transportation Command officials. GAO is making three recommendations to DOD that are aimed at implementing the Department of the Treasury's daily cash balance initiative and ensuring that the AFWCF receives the appropriate funding if a cash shortfall occurs because of a lack of ARA funding or estimated savings not being realized. 