As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FMS UPDATE, LEFT FMS FAILED TO LOAD. ALL DATA ON LEFT SIDE IS LOST UNABLE TO RECOVER. REPLACED CORE PROCESSOR MODULE-ACMF M002 IN LEFT AIMS CABINET PER MM AND ACCOMPLISHED CPM-ACMF SOFTWARE INSTALLATION PER MM. LEFT AIMS CHECKS OK, ACCOMPLISHED FMS UPDATE PER MM 34-61-00.