From FS2004 and FSUIPC SDK I cannot find any information about the aircraft's status (taxi, take off, cruse, landing) except one bStatus for AI Aircraft in FSUIPC SDK shown as below: The “bState” value is new for FS2004. When non-zero it gives the current status of the AI aircraft, as follows: 0x80 128 Initialising 0x81 129 Sleeping 0x82 130 Filing flight plan 0x83 131 Obtaining clearance 0x84 132 Pushback (back?) 0x85 133 Pushback (turn?) 0x86 134 Starting up 0x87 135 Preparing to taxi 0x88 136 Taxiing out 0x89 137 Take off (prep/wait?) 0x8A 138 Taking off 0x8B 139 Departing 0x8C 140 Enroute 0x8D 141 In the pattern 0x8E 142 Landing 0x8F 143 Rolling out 0x90 144 Going around 0x91 145 Taxiing in 0x92 146 Shutting down Maybe we only can judge the status by ourselves according the aircraft's speed, attitude, gear/flaps status etc.