The National Transportation Safety Board final report on the fatal crash of a Hawker 900XP over Westwater, Utah, in February notes the crew attempted to perform stall tests in icing conditions, even though they lacked experience performing the tests in the Hawker and were unfamiliar with the stall characteristics, which led to a loss of control and the death of both the pilot and copilot.
According to the report, two AIRMETs were issued about two and a half hours before the accident flight for moderate icing throughout the airplane’s climb and cruise altitude for the stall test. In addition, video showed that the departure airport was surrounded by obscuration and precipitation during takeoff.
