What happened
On March 31, 2021, an INPAER Explorer aircraft, registration PR-ZJW, departed from the Tangará da Serra Aerodrome (SWTS) for a private flight to Cáceres (SWKC). Shortly after takeoff from runway 18, the engine began to malfunction. The pilot attempted to execute a return to the runway, but during the maneuver, the aircraft struck a 2.4-meter-high wire fence before impacting the ground. The impact destroyed the aircraft, and both the pilot and the passenger sustained fatal injuries.
The investigation
CENIPA investigators examined the aircraft's flight data using the onboard Dynon EFIS. The data revealed that after the initial climb, the pilot performed a steep left turn at a 70-degree bank angle. During this maneuver, the aircraft's indicated airspeed dropped to levels near or below the stall speed. Furthermore, while the pilot's manual recommends attempting a return to the runway at an altitude above 500 feet, the investigation established that the maneuver was initiated at only 245 feet.
Engine analysis conducted by specialists found no internal mechanical failures, such as lubrication issues or component breakage, that would explain the power loss. However, investigators noted that the two engine air intake covers (used for storage when not in use) were found near the engine air ducts. This led to the hypothesis that the covers may have been left on the intakes, restricting necessary airflow.
Findings
- The engine likely suffered a power loss due to the possible operation with the air intake covers installed, which would have obstructed airflow.
- The pilot's decision-making and flight controls contributed to the accident, as the return-to-runway attempt was performed at an altitude and airspeed that compromised aircraft controllability.
- The pilot lacked specific recorded training for performing a return-to-runway maneuver following an engine failure.
- An available area of cornfield adjacent to the runway could have been utilized for an emergency forced landing.