What was found
PDIS 591 24-32 3445 26JUL19 SMF OPEN U LOGPAGES:3143271 ABOUT AN HOUR OUTSIDE OF LANDING SMF RECEIVED LEVEL "EMER PWR ON" CONSULTED QRH AND MEM MX. AT BATTERY DECREASE TO 21 VOLTS WE DEPLOYED THE ADG- EVENTUALLY BATT VOLTS RECOVERED TO 30 VOLTS. ON SHORT FINAL RECEIVED MUTIPLE OTHER ELECTRICAL FAULTS. ALSO,WITH EMER PWR SWITCH OFF RECEIVED LEVEL T BUS L EMER OFF. ON ARRIVAL HAD BUS L EMER DC OFF. ALSO EMER PWR TEST FAILED. REPLACED EPCU AND L EMER AC BUS SENSING RELAY R2-5156 AND EMER PWR RELAY R2-5411 PERFORMED OPS CHECK REF AMM 24-08-01-4 & 24-08-01-5 SSM 24-24-0 SWP CHAP 20 LLM REQUIREMENT C/W TEST GOOD. EMER POWER TEST PASSED. BATTERY CHARGES NORMAL. A/C OK FOR SERVICE. ADG WAS DEPLOYED NEW ITEM CREATED FOR STOWING ADG WRI 24-22/3449.