As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DATA WAS LOST ON ALL DISPLAY UNITS 2-4 SECS AT A TIME REMOVED AND REPLACED DEU1 IN REF TO AMM 31-62-21-400-801, OP CHECKED GOOD. INSTALLED REQUIRED SOFTWARE IN REF TO AMM 31-62-21-470-802 PARTS USED: 29-3162-9-0002, QTY :1 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1301803 SN OFF 2520.UNIT, E&E BOX E OFF 29-3162-9-0002 2520 ON 29-3162-9-0002 1164