What was found
DURING EMERGENCY LIGHT AND SYS SWITCH TEST FAULT "EPSU EXT LOAD EMERGENCY RT EPSU BATTERY EMERGENCY RT". MAINTENANCE REPLACED BATTERY PACK AT RT EPSU. OPS CHECK WAS NORMAL.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING EMERGENCY LIGHT AND SYS SWITCH TEST FAULT "EPSU EXT LOAD EMERGENCY RT EPSU BATTERY EMERGENCY RT". MAINTENANCE REPLACED BATTERY PACK AT RT EPSU. OPS CHECK WAS NORMAL.