What was found
THE CREW REPORTED COMM 1.2.3 WAS WEAK/UNREADABLE WITH C & R INTERMITTENT, COM 1 WEAKER THAN COM 2 WITH CONSTANT STATIC. DECLARED AN EMERGENCY AND RETURNED TO DEPARTURE. ACFT LANDED WITHOUT INCIDENT. ACFT REMOVED FROM SERVICE. TESTED COMM 1, 2, 3 IAW AMM 23-12-00, FOUND NO STATIC ON ALL 3 SYS, FOUND SYS 2 AND 3 WORKING GOOD, NO MX ON 2 AND 3 COMM, FOUND COMM NR 1 WEAK. R & R ICU NR 1 IAW AMM 23-00-01 AND R & R NR 1 RMU IAW AMM 23-81-01. RADIO MANAGEMENT UNIT, INTEGRATED COMMS UNIT VHF. THE OPS CHECK WAS GOOD NR 1 COMM IAW AMM 23-12-00 AND THE OPS CHECK WAS GOOD RMU IAW AMM 23 81 00. THE ACFT WAS RETURNED TO SERVICE.