As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING AN AVIONICS INSTALLATION AND ASSOCIATED WIRING, FOUND A WIRE BUNDLE WHICH RUNS TO THE COPILOT'S CIRCUIT BREAKER PANEL CHAFING ON PANEL LOWER MOUNT WITH ONLY 150 HOURS TT. ONE OF THE MAIN POWER WIRES HAD CHAFED THROUGH TO BARE METAL AND HAD BEEN ARCING ON THE MOUNT. REPAIRED WIRE AND REPOSITIONED WIRE BUNDLE TO CLEAR THE MOUNT.