As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING SCHEDULED CAPACITY CHECK, BATTERY PACK PN/61-2275-1 SN/0008399 FAILED ON 8/18 AND 8/25/04. MAINTENANCE REPLACED BATTERY ASSEMBLY PN 61-2274-1. UNIT PASSES CMM CHECKS. RETURNED TO SERVICE 8/29/04. REFER TO WO NR 374244 FOR ADDITIONAL INFORMATION.