As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE STANDBY POWER RECTIFIER/HEAT SINK ASSY PN 1159F40669-11, LOCATED UNDER FLOORBOARD NR 19, WAS CHAFING AGAINST TOTAL TEMP PROBE LINE PN 1159AC40071-025P6. THIS WORE A HOLE IN THE LINE. THERE IS EVIDENCE OF AN AIR BLAST ON THE BLACK PAINT OF THE HEAT SINK.