As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT EMERGENCY POWER SUPPLY BATTERY 12WL REQUIRES REPLACEMENT. REPLACED POWER SUPPLY AND BATTERY REF AMM 33-51-38. TESTED NORMAL.PARTS USED: 18-3351-3-0001,QTY :1 31-3350-9-9001,QTY :1 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1835569 SN OFF 8208 IPC REFERENCE # 33-51-04-03 POWER SUPPLY, P OFF 31-3350-9-9001 8208 ON 31-3350-9-9001 8235