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 900DG 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 SI1274B. SUBMITTER SUGGESTED REPLACING ALL FUEL AND OIL LINES WITH TEFLON TYPE. SUSPECT FUEL LINE HAD 30 HRS SMOH.