What was found
AFTER RT ENGINE START, RT ENGINE EEC IN ALT MODE. TRANSFERRED TO DMI 140096, IAW DDG/MEL 73-21-01-03. CAT C DUE 06JAN21. MCC NOTIFIED. PLACARD INSTALLED. A/C CAT III RESTRICTED. REMOVED AND REPLACED L ADC (OFF PART: PN 4040800-906, SN 93103896, PER FIM TASK 71-01 TASK A 39 REF B767 AMM 34-12-01, FOR REMOVAL AND INSTALLATION. OPERATIONS CHECK GOOD. REMAINS IN WORK. REMOVED AND REPLACED R (PIMU) UNIT AT M1414. OPERATIONS CHECK NORMAL AT THIS TIME, IAW AMM 77-35-02-404-006-H00.