What was found
ENG OVSPD PROT SYS R RIGHT ENGINE OVERSPEED PROTECTION SYSTEM IN THE EEC FAILED SELF TEST. DB ELECTRONIC ENGINE CONTROL CHAN-A (RIGHT ENG) PERFORMED ENGINE NR 2 IDLE RUN REF MAINTENANCE MESSAGE 75-13682 - FAULT ISOLATION REFERENCE: DMC-B787-A-G75-00-F0-08A-421A-A COMPLIED WITH STEP 1.A UP TOP INCLUDING STEP 1.A(5)...NO ACTIVE OR FAULTS NOTED. REQUIRES 8 TECH HOURS, UPDATING LABOR HOURS FOR INFO ONLY. INFO ONLY REMOVED AND REPLACED EEC, AS PERCAUTION. REF AMM DMC-B787-A-G73-21-05-00A-720A-A. SOFTWARE CHECK GOOD AND GROUND TEST PASSED. C/W IDT ON INSTALLATION OF E2 EEC PER AMM B787-A-G73-21-05-00A-720A-A.