As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE CHECKING RT ENGINE OVER FOR OIL LEAKS, FOUND NUT AND PART OF BOLT FROM TOP FORWARD NR 2 CYLINDER THRU BOLT LODGE BY OIL FILLER TUBE. BREAK ON BOLT APPEARS TO BE OLD BY THE DARK COLOR. REMOVAL OF CYLINDER NECESSARY TO REPLACE BOLT. (K)