What was found
ENG #2 SHORT TERM FAULT 73-20052 INTERNAL EEC FAULT, 79-21092 THE ENGINE OIL PRESSURE SIGNAL (PEO) IS OUT OF RANGE, 73-21452 THE THRUST LEVER ANGLE POSITION SIGNAL IS OUT OF RANGE, 78-21542 EACH REVERSER SLEEVE HAS ONE POSITION SIGNAL OUT OF RANGE. DEFER PER TC 78273000. GROUNDED - YES. FOUND EEC TO BE FAILING AND LOGGING MULTIPLE FAULTS. REMOVED & REPLACED #2 EEC. OP CK NORMAL. EEC BITE NORMAL BOTH PRE & POST ENGINE RUN. ACTUATORS TEST NORMAL. REF B737-900 AMM 73-21-60-00-801-F00 & 73-21-60-400-801-F00.