As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STATUS MESSAGE R2 IGN APPROXIMATELY ONE HOUR INTO FLIGHT. AIRCRAFT RETURNED TO FIELD. *S/D* IGNITOR LEADS AND EXCITERS FROM R1 AND R2 RETURNED TO PRATT AND WHITNEY FOR INVESTIGATION. UPDATE: R2 EXCITER (10-621630-1) AT FIFTY PERCENT OUTPUT. R1 IGNITION LEAD (10-609660-7) SIXTY PERCENT BURNED. PITTED ON PLUG END CONTACT. CUT IN CABLE INSULATION.