As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEVERAL CELLING STANDBY LIGHTS INOP. FOUND BATTERY PACKS B5-100 AND B5-102 BAD. SWAPPED IN KNOWN GOOD BATTERIES. OPS NORMAL. REMOVED AND REPLACED BATTERIES IN PACK B5-100. STILL NEEDS BATTERIES FOR POWER PACK B5-105. REPLACED BATTERIES IN POWER PACK B5-102. OPS NORMAL. OK FOR SERVICE REF 33-53-00.