As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING 100-HOUR INSPECTION, FOUND THE NR 6 CYLINDER TOP FORWARD STUD/THRU-BOLT BROKEN AT THE CYLINDER BASE. TCM TECH REP SAYS THAT THERE HAS BEEN A PROBLEM WITH THRU-BOLTS BREAKING EVEN BEFORE THEY LEAVE THE FACTORY. HYDROGEN EMBRITTLEMENT IS THE CAUSE. SUBMITTER DOESN'T KNOW WHY THIS ONE BROKE.