As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THIS ENGINE WAS RECEIVED FOR A CASE CHANGE. THE CRANKSHAFT WAS A NON VAR. REMOVED THE 6 BOLTS THAT ATTACH THE CRANK GEAR AND BOLTS FOUND APROXIMATELY .25 INCH SHORTER THAN REQUIRED. SUBMITTER STATES WHOEVER ASSEMBLED THIS ENGINE PUT ROCKER SHAFT BOLTS, PN 537019, INSTEAD OF PN 536379, AS REQUIRED. LOG BOOKS WERE NOT SENT.