Malaysia Airlines Flight 370 made a sharp U-turn and decreased altitude after the flight crew lost communication with ground control. These actions may have been pre-set by the flight crew in case of emergency, a common practice, according to Florida State College at Jacksonville Aviation Programs Manager and Flight Instructor Sam Fischer. What actually happened in the cockpit after losing contact with ground crew won't be known until the plane, and its flight recorder, are found. Seasoned pilot Fischer offers theories as to what probably occurred. Report aired March 24, 2014 WJXT at 10 p.m. Copyright 2014 by News4Jax.com.