What was found
ACARS NO COMM IN FLIGHT. S COPE *** HISTORY: 1/16 CND - ORD*** AHEAD PRO IS. NOT FLAGGING ANY. PERFORM FIM TASK 23-24-00-810-908-A STEPS 1, 3 SKIP 2, 4, 5, AND 6. CONTINUE TO STEP 7 THROUGH 20 MINUS STEP 10 PLUS. ELECTRICAL CHECKS ON TABLE 201. IF NO FAULT FOUNDS RAR VHF 3 ANTENNA AND CHECK THE CONNECTOR TO MAKE SURE THAT IT ISNT CORRODED. T/S IAW FIM TASK 23-24-00-810-908-A. SUSPECTED FAULTY VHF 3 ANTENNA. RAR VHF 3 ANTENNA IAW ERJ 170 AMM 23-12-02. PERFORMED OPS CHK IAW ERJ 170 AMM 23-12-00. OPS CHK GOOD. NO FURTHER DEFECTS NOTED.