As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CAPACITY INSPECTION IN MSP, BATTERY PACK P/N 61-0478-9, S/N 9804449 REMOVED FOR SCHEDULED CAPACITY CHECK, CAPACITY CHECK FAILED. MAINTENANCE REPLACED BATTERY ASSEMBLY P/N 55-2198-1 & UNIT PASSES CMM CHECKS. RETURNED TO SERVICE 10/4/04.