Aircraft: Cirrus SR20. Injuries: 4 Fatal. Location: Duck Creek Village, Utah. Aircraft damage: Destroyed.
What reportedly happened: The pilot had extensive rotorcraft/helicopter flight experience but had accumulated only about 160 hours total flight time in fixed wing airplanes, including about 17 hours in the Cirrus. The pilot’s most recent flight in a Cirrus took place about 18 months before the accident.
The accident happened in mountainous terrain on the second leg of a cross-country flight in daytime VFR conditions. Recorded data recovered from the airplane revealed that about 40 minutes into the flight, the plane reached its highest recorded altitude of 7,847 feet MSL. At this time, the plane was about four miles from a mountain ridge directly ahead, the lowest point of which was 8,470 feet MSL, with terrain elevations of more than 9,000 feet MSL on both sides.
The recovered data revealed that the airplane’s stall warning system activated about three minutes before the accident and remained on for most of the remaining recorded data.
The data indicated that the airplane rolled steeply to the left, briefly recovered and pitched up 10° to 15°, and then rolled to the left in a nearly 67° inverted nose-down attitude before crashing.
Post-accident interviews with personnel from the company that rented the airplane to the pilot revealed that, on a previous occasion, he had been observed overloading the airplane and was advised that he could not take that much baggage on the flight. The company personnel further stated that on the morning of the accident, after the company fueled the plane, the pilot taxied the airplane to another area on the airport where he loaded his passengers and baggage. This location was about 1/4 mile away and was not visible from the company’s facility.
The calculated density altitude at the time of the accident was 9,287 feet, which would have been detrimental to the airplane’s climb performance, especially if it was overloaded.
Investigators determined that, based on the available information, it is likely that the pilot was unable to maintain sufficient airspeed to climb over the high terrain, which resulted in an aerodynamic stall.
Further, it is likely that a combination of the pilot overloading the airplane and the high density altitude conditions would have resulted in the airplane’s reduced climb performance.
Further, the pilot’s lack of experience operating fixed wing airplanes in mountainous terrain likely negatively affected his decision to attempt to fly over the mountainous terrain with the given conditions and contributed to the accident.
Probable cause: The pilot’s failure to maintain sufficient airspeed and control while maneuvering a heavily loaded airplane over high mountainous terrain in a high density altitude environment. Contributing to the accident was the pilot’s lack of experience operating fixed wing airplanes in such an environment.
NTSB Identification: WPR12FA235
This May 2012 accident report is provided by the National Transportation Safety Board. Published as an educational tool, it is intended to help pilots learn from the misfortunes of others.