As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX - TRANSMITTING ON COMM 1 FROM BOTH ARCDU'S 120.4 THERE WAS BLEED OVER ON COMM 2 132.000. DIVERTED TO PDX, LANDING UNEVENTFUL. REMOVED AND REPLACED NR 1 COMM TRANSCEIVER IAW DASH 8 (400) AMM 23-11-01-000-801. PERFORMED NR 1 & 2 COMM TRANSCEIVER OPS TEST IAW DASH 8 (400) 23-11-00-710-801, OPS CHECKED GOOD. AIRCRAFT RETURNED TO SERVICE.