A Cessna Citation 525 twin-engine jet broke up in flight while maneuvering near Cedar Fork, Utah, the NTSB says in a preliminary report now posted online. The pilot and passenger both were killed. The CJ3 took off from Salt Lake City International Airport about 9:50 in the morning on Jan. 18, headed for Tucson International Airport. Shortly after takeoff, the pilot called ATC to report a failure in the flight management system, and said he needed to fly straight ahead and climb while he tried to program the backup FMS.
Source: avwebNTSB: Citation Jet Broke Up In Flight