What was found
AFTER LANDING REVERSER LIMITED, ENGINE CONTROL, AND "MAINT" LIGHTS CAME ON AT OVERHEAD PANEL. GROUNDED - YES. DURING TROUBLESHOOTING PER B737-9 IFIM 73-21-00-810-847 FOR MESSAGE 73-42701, EXISTING FAILURE MESSAGES 73-42362 (FUEL METERING SHUTOFF VALVE FAILED OPEN) AND 77-09002 (ENG 1 CHANNEL B INTERNAL FAULT) POPULATED. #1 ENG EEC B KEPT RESETTING TRIGGERING MASTER CAUTION & ENGINE CONTROL LIGHT. REMOVED & REPLACED #1 ENG EEC B. ALL TESTS PASS. NO MORE FAULTS GENERATED. REF B737-9 AMM 73-21-05. DUAL ENGINE RUN ACCOMPLISHED. NO FAULTS GENERATED. (REF ASA LP 60380015).