As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSTALLED NEW SHAFT, PN 0894000-12 ON BOTH MLG AT 3520.9 AND AT 3620.9. BOTH SHAFTS WERE CRACKED ON RT SIDE. THE NEW STYLE SHAFTS HAVE A LARGER DIAMETER ROLL PIN AND THIS HOLE IS WHERE THE CRACKS ARE STARTING FROM. THE NEW STYLE SHAFTS ARE MADE WEAKER BY HAVING A BIGGER HOLE IN THEM.