THE AIRPLANE EXPERIENCED A LOSS OF ENGINE POWER WHILE IN CRUISE FLIGHT AND COLLIDED WITH TREES DURING THE FORCED LANDING IN TREE COVERED TERRAIN. THE AIRPLANE'S FUEL SELECTOR VALVE WOULD BIND WHEN ROTATED AND THERE WERE NO INDENTATIONS AT THE RIGHT, LEFT, OR OFF POSITIONS. THE FUEL SELECTOR VALVE WOULD REMAIN WHEREVER IT WAS POSITIONED.