As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN CRUISE FLIGHT, ENGINE RAN ROUGH HAD LOW EGT 900 DEGREES. ON NR 2 CYLINDER. AFTER LANDING AND TROUBLESHOOTING, FOUND DEBRIS IN FUEL LINE FROM SERVO TO FLOW DIVIDER. REPLACED RUBBER FUEL LINE WITH TEFLON LINE P/N LW12784-4-172 IAW LYCOMING SI 1274B. SUBMITTER SUGGESTED REPLACING ALL FUEL AND OIL LINES WITH TEFLON TYPE LINES. TT ON RUBBER FUEL LINE 30 HOURS. (X)