What was found
AT CRUISE UPPER DISPLAY ENGINE NR 1 AMBER BOXES FLICKERED MOMENTARILY WITH ONLY LOW OIL PRESS TEST SHOWING. ENGINE NR 1 AMBER BOXES BLINKED FOR 10 SECONDS FOLLOWED BY LOW OIL PRESSURE TEXT REMAINING ON. GROUNDED - YES. REMOVED AND REPLACED NR 1 ENGINE EEC PER AMM 73-21-60-000-801-F00 / MM 73-21-60-400-801-F00. REFERENCE IPC 73-21-60-01A ITEM 169 - VERIFIED EEC SOFTWARE 2044M25P19 INSTALLED. PERFORMED FADEC TESTS PER MM 73-21-00-700-802-F00: EEC TEST PER AMM 73-21-00-700-804-F00; IDENT/CONFIG TEST PER AMM 73-21-00-700-808-F00; POWERPLANT TEST 12 - ACTUATORS TEST PER AMM 71-00-00-700-807-F00; AND EEC DISCRETES TEST PER AMM 73-21-00-700-809-F00 - ALL TESTS PASS.