As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CTR RADIO FREQ PANEL WILL NOT REMAIN IN DATA MODE. DEFERRED PER MEL. DATA MODE WORKS IN VHF R MAT MSG 23-71071 DCMF IN AIMS L MODEM PROBLEM ACTIVE TRIED TO RESET CPM COM (M001) IN LEFT AMIS, NO HELP. SUSPECT CPM COM MODULE M001 IN LEFT AMIS AT FAULT IF NEED PCN 483-9007 PER FIM 23-27 TASK 806. CABINET ASSY 483-9007 ON AOG Q1040 IF NEEDED. PLEASE CONTINUE TO TROUBLESHOOT. REPLACED CPM COM (M001) REFERENCE MM. OPS CHECKED NORMAL.