"On Memorial Day weekend in 2007, Kelly flew to Indiana to watch the Indy 500 with Giffords, his then-fiance. Kelly listed the purpose of the trip as "Space Flight Readiness Training." NASA later said the flight may have violated the agency rules requiring astronauts "to avoid any appearance of inappropriate use of NASA T-38's" when logging their required monthly flight hours. The trip cost taxpayers almost $9,000."
"2. 0-KE.07.0167-S, March 11, 2008, Possible Misuse of NASA Aircrafts/Lisa Nowa k"
On May 7, 2007, Raymond Sander, Johnson Space Center, presented the following scenario to Michael Griffin, NASA Administrator, at an ongoing "Ask the Administrator" meeting: "If 1, as a NASA employee in good standing get involved in some emotional, non lethal altercation and arrested by law enforcements agents in Florida, will NASA quickly dispatch my supervisor in a Government T-38 or equivalent, to represent NASA and assess the matter?" The Administrator responded to this question by answering "No."
Keith's note: I find it somewhat annoying that JSC often complains that there is not enough travel money for astronaut appearances and yet astronauts can fly T-38's almost any where they want to since the T-38 air time counts against their flight proficiency. That said, based on my experience, such questionable T-38 usage is the exception - not the rule. But it still happens.