Incident Overview
A pilot reported that the takeoff proceeded normally. However, while attempting to adjust the pitch attitude during climb out of ground effect, the control yoke became locked in position and could not be moved fore or aft. The pilot aborted the takeoff. The aircraft porpoised down the remaining 1,500 feet of runway, causing the nose landing gear to collapse.
Postaccident Examination
A postaccident examination conducted by two FAA inspectors failed to identify any type of control interference. The inspectors also noted that the company station manager reported that the pilot had initially mentioned experiencing 'odd vibrations' just before the abort was initiated.
Findings
No mechanical obstruction or malfunction was found in the flight control system. The exact reason for the control yoke lock remains undetermined based on the available evidence.