As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SUPPORT TASK BATTERY PACK AT STATION 727C+13 WILL NOT CHARGE. REMOVE BATTERY PACK & CHARGER ASSEMBLY AT STATION 727C+13 M01671 & INSTALLED SERVICEABLE BATTERY PACK & CHARGER ASSEMBLY IAW AMM 33-51-06. PERFORMED TEST OF EMER LIGHTS IAW AMM 33-51-00, TESTED OK.