As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN LEANING BACK TO ADJUST SEAT POSITION, BELLCRANKS (LT) AND (RT) BROKE AT SMALL ATTACHMENT HOLE ALLOWING SEAT BACK WITH UPPER FRAME ASSEMBLY TO FALL BACKWARDS. THE BREAK WAS CLEAN AND SHOWING NO PRIOR CRACK PROGRESSION UNTIL FAILURE. AIRCRAFT TC 3124.