Autopilot Malfunction and Return
Shortly after takeoff and climbout, the autopilot malfunctioned after the aircraft entered an overcast and encountered rain and turbulence. The pilot returned to Bermuda Dunes, California. After landing, he had the electrical, avionics, and autopilot systems checked, and all items were operational.
Second Departure and Equipment Issues
The pilot prepared to take off again but failed to turn on the standby gyro, which was battery powered. After departing, he again encountered rain and turbulence in instrument flight conditions at about 9,500 feet. At about that time, air traffic control advised that his transponder was not providing a return. He switched transponders, but ATC still received no return.
High-Speed Descent and Recovery
Severe turbulence was encountered, the autopilot disengaged, and the copilot's gyros tumbled. He turned on the standby gyro, which needed time to be used. A high-speed descent was entered inadvertently, and the airspeed warning horn activated. The pilot activated the speed brakes and made a sharp pull-up during the recovery. He then returned and landed.
Post-Flight Findings
Wrinkles were found on the leading edges of the wings.