As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) 7MM IGNITION WIRE INSULATION VERY SOFT. CHAFED BADLY ON INSIDE HARNESS AND EVEN AGAINST OTHER WIRES. CAUSED INTERMITTENT ROUGH MAG IN-FLIGHT.TALKED TO OVERHAUL SHOPS. THEY SAY THERE WAS A POOR BATCH OF WIRE USED ABOUT 4 YEARS AGO, OTHER PROBLEMS WERE SURFACING. ENGINE WAS OVERHAULED IN 1995. 2001-01-03TC: MORE INFO IS REQUESTED FROM ORIGINATOR -- FEEDBACK ARTICLE WILL BE PROPOSED.2001-01-16TC: SUSPECT LEADS HAVE A PART NUMBER STAMPED ON LEADS ( J557-USA ).