As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) NR 2 COM SET KX175B (A LOANER UNIT) WENT DEAD. AIRCRAFT IS USUALLY OPERATING WITH A MAC 1700 (KX175B + DIGITAL). AVIONICS SHOP ADVISED THAT TROUBLE ORIGIN APPEARS TO BE A FAILING INTERCOM SYSTEM AND AUDIO PANEL DUE TO UNPROFESSIONAL WIRING SHOWING BEHIND RIGHT INSTRUMENT PANEL.