As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) REMOVING THE TCAS CONTROL PANEL ON THE CAPT SIDE FOR PART NUMBER VERIFICATION, SPARKES AND ARCING WHERE OBSERVED COMING OUT OF THE BUNDLE BEHIND THE PANEL. CB PULLED AND SOURCE INVESTIGATED FOUND SEVERVAL WIRES WITH THE INSULATION MISSING DUE TO WIRE CHAFFING. WIRING WILL BEREPAIRED AND THE WIRE BUNDLE RE-ROUTED TO AVOID CHAFFING.