As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
REFERENCE DRAWING 0514222 (SEAT BACK ASSY, AFT BENCH 172) VIEWING THE -1 SEAT BACK ASSY. AT THE LOWER RIGHT HAND CORNER OF THE SEAT BACK THRE IS A -11 FRAME END THAT WELDS TO THE -4 FRAME UPPER. THE WELD IS APPROXIMATELY 7.30 INCHES UP FROM THE BOTTOM OF THE -11 FRAME END. APPROXIMATELY .75 INCH BELOW THIS WELD JOINT THE SEAT BACK HAS BROKE IN HALF. (X)