As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE ROD FAILED AT THE SPLIT RETAINER INDICATING THE TUBE IS NOT STRONG ENOUGH TO WITHSTAND SPRING PRESSURE. SUBMITTER RECOMMENDS ALL HARTZELL PROPS WITH THE OLD STYLE ROD BE CHANGED WITH THE NEW STRONGER ROD, PN C-1948, IAW HARTZELL SB 177.