Summary
On December 04, 2011, a Thompson Tommy W LOEHLE P5151 (N212WE) was involved in an accident near Courtland, AL. The accident resulted in 1 serious injury. The aircraft sustained substantial damage.
The National Transportation Safety Board determined the probable cause of this accident to be: The airplane's inadvertent encounter with excessive windshear while on the downwind traffic pattern leg at low altitude, which resulted in the pilot's inability to arrest the airplane’s descent. Contributing to the accident was the pilot's decision to fly the traffic pattern at a low altitude in gusty wind conditions.
According to multiple statements, the seller of the single-seat, amateur-built airplane first performed a preflight inspection, along with the buyer and an evaluation pilot, then flew a demonstration flight around the traffic pattern at 300 to 400 feet above the ground to a full stop landing. Winds were straight down the runway at 10 knots, but gusty. The evaluation pilot, who had not previously flown the model, subsequently performed ground checks and taxi practice before taking off and climbing the airplane to about 400 feet. He then turned the airplane onto the crosswind leg, and reduced power before turning it onto the downwind leg. After several seconds on the downwind leg, the airplane began to descend.
This accident is documented in NTSB report ERA12CA096. AviatorDB cross-references NTSB investigation data with FAA registry records to provide comprehensive safety information for aircraft N212WE.
Accident Details
Probable Cause and Findings
The airplane's inadvertent encounter with excessive windshear while on the downwind traffic pattern leg at low altitude, which resulted in the pilot's inability to arrest the airplane’s descent. Contributing to the accident was the pilot's decision to fly the traffic pattern at a low altitude in gusty wind conditions.
Aircraft Information
Registered Owner (Historical)
Analysis
According to multiple statements, the seller of the single-seat, amateur-built airplane first performed a preflight inspection, along with the buyer and an evaluation pilot, then flew a demonstration flight around the traffic pattern at 300 to 400 feet above the ground to a full stop landing. Winds were straight down the runway at 10 knots, but gusty. The evaluation pilot, who had not previously flown the model, subsequently performed ground checks and taxi practice before taking off and climbing the airplane to about 400 feet. He then turned the airplane onto the crosswind leg, and reduced power before turning it onto the downwind leg. After several seconds on the downwind leg, the airplane began to descend. The pilot added full power to arrest the descent; however, the airplane continued descending at full power, dropping almost vertically before impacting the ground in a level attitude and substantially damaging the wings and fuselage. Terrain elevation about 3 nautical miles upwind of the runway was approximately 150 feet higher. No preexisting mechanical anomalies were noted with the airplane, and all of the statements indicated that the engine was producing full power during the airplane's descent.
Data Source
Data provided by the National Transportation Safety Board (NTSB). For more information on this event, visit the NTSB Records Search website. NTSB# ERA12CA096