What aircraft was involved and where did it happen?

The accident on 2006-02-17 involved a Spane RV-4, registration N437T, at Wichita, KS.

What was the probable cause of the accident?

The pilot's inadequate preparation prior to takeoff, and his failure to maintain control of the airplane resulting in a stall and subsequent crash. Factors contributing to the accident were the unsecured canopy latch, the pilot's diverted attention, and the stall mush.

Canopy Opens During Climb, Resulting in Hard Landing (N437T)

On February 17, 2006, a Spane RV-4 (registration N437T) was involved in an aviation accident near Wichita, KS. Investigators recorded the probable cause as: The pilot's inadequate preparation prior to takeoff, and his failure to maintain control of the airplane resulting in a stall and subsequent crash. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.

During takeoff climb at about 80 feet, the canopy opened fully, causing a 45-degree right yaw. The pilot reduced power, applied left rudder, and closed the canopy, but the aircraft descended and pancaked onto the runway from about 20 feet. Post-accident examination found no anomalies with the canopy latch or other systems.

Incident Summary

A pilot reported that after performing a run-up check, he took the runway for takeoff. The airplane rotated, lifted off, and was climbing normally. When the aircraft reached approximately 80 feet above the ground, the canopy suddenly opened. The pilot stated that the canopy moved to the full open position, and the airplane subsequently yawed 45 degrees to the right.

Pilot Actions

In response, the pilot lowered the airplane's nose, applied full left rudder, and reduced engine power to idle. He then switched hands on the control stick and, with his right hand, reached up and pulled the canopy closed. According to the pilot, his airspeed was just above the stall speed and the wings were level. The airplane was approximately 20 feet above the ground when it "pancaked perfectly flat to the side of the runway."

Post-Accident Examination

An examination of the airplane's canopy latching mechanism and other airplane systems revealed no anomalies. No mechanical or system malfunctions were identified that could have caused the canopy to open.

Probable Cause

No probable cause was stated in the source.

2006-02-17: Spane RV-4 (N437T) — Wichita, KS