What was found
AIRCRAFT NOT GROUNDED: MAINTENANCE REPORTS WHILE ACCOMPLISHING CARD 26L00025011 INSTALL OF SLIDE PACK, TEST FOR EMER SYS FAULT EPSU INT LEFT, COULD NOT RESET. REPLACED LEFT EPSU AND BATTERY, REPLACED FWD EPSU BATTERY IAW AMM 33-51-38. OPS TEST OK IAW AMM 33-51-00. (SEE SDR # AALA201907059023)