What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) The pilot departed hollis empty in a DHC-2 on floats. Upon climbing through 200 ft. AGL, and in a 20 degree banked turn, the control yoke handles broke away from the rest of the yoke assembly, leaving the pilot without aileron control. The pilot was able to regain roll control using rudder, and pitch control was still possible using the remaining control yoke. The pilot flew to Ketchikan where he landed uneventfully, in the presence of emergency equipment. It was determined that a large area washer on the control yoke assembly had failed. This large washer ensures the castle nut and cotter pin holding the handles do not slide through the center of the splines that holds the handles to the control yoke. The washer was missing and could not be found.
As the FAA filed it
(-23) THE PILOT DEPARTED HOLLIS EMPTY IN A DHC-2 ON FLOATS. UPON CLIMBING THROUGH 200 FT. AGL, AND IN A 20 DEGREE BANKED TURN, THE CONTROL YOKE HANDLES BROKE AWAY FROM THE REST OF THE YOKE ASSEMBLY, LEAVING THE PILOT WITHOUT AILERON CONTROL. THE PILOT WAS ABLE TO REGAIN ROLL CONTROL USING RUDDER, AND PITCH CONTROL WAS STILL POSSIBLE USING THE REMAINING CONTROL YOKE. THE PILOT FLEW TO KETCHIKAN WHERE HE LANDED UNEVENTFULLY, IN THE PRESENCE OF EMERGENCY EQUIPMENT. IT WAS DETERMINED THAT A LARGE AREA WASHER ON THE CONTROL YOKE ASSEMBLY HAD FAILED. THIS LARGE WASHER ENSURES THE CASTLE NUT AND COTTER PIN HOLDING THE HANDLES DO NOT SLIDE THROUGH THE CENTER OF THE SPLINES THAT HOLDS THE HANDLES TO THE CONTROL YOKE. THE WASHER WAS MISSING AND COULD NOT BE FOUND.