As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE SHIELDING ON THE IGN LEAD ON 4 CYLINDERS AT THE PLUG ENDS FRAYED AND BROKEN ALLOWING IGN NOISE TO BE HEARD OVER AIRCRAFT RADIO. PREVENTS PILOT FROM UNDERSTANDING ATC SHIELDING BROKE RT AT (B) ASSEMBLY. THIS IS THE RED SLICK IGN HARNESS.