What was found
ON LEVELOFF AT FL 330, BUSS RT EMERGENCY AC OFF INDICATOR ILLUMINATED WITH ALL ASSOCIATED FAILURES. RAN CHECKLIST, AND DIVERTED IAW GOCC. TROUBLESHOT IAW FIM 24-25-01, FOUND REAC SENSE RELAY/INTFC FAULT CFDS. R & R SENSING RELAY R2-5157 AND RT EMERGENCY AC BUSS RCCB B1-138 IAW 24-50-01-2. R & R TRANSFER RELAY R2-18 IAW 24-25-03-2. PERFORMED EPCU RTS IAW 24-08-02/501 SATISFACTORY. ELECTRICAL EMERGENCY POWER SYS TEST PERFORMED IAW 24-00-00-50, NO DEFECTS NOTED. TRANSFERRED POWER FROM APU TO EXTERNAL POWER AND BACK SEVERAL TIMES NO DEFECTS NOTED. ACFT OK TO CONTINUE.