Section 301-70.905 - What documentation must we retain for travel on our Government aircraft?(a) You must retain for two years copies of travel authorizations for senior Federal officials and non-Federal travelers who travel on your Government aircraft.(b) You must also retain for two years the following information for each flight: (1) The tail number of the Government aircraft used.(2) The dates used for travel.(3) The name(s) of the pilot(s), other crewmembers, and qualified non-crewmembers.(4) The purpose(s) of the flight.(6) The names of all passengers.