As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CAPACITY CHECK, BATTERY PACK EMERGENCY POWER SUPPLY WAS REMOVED FOR SCHEDULED DISCHARGE CHECK ON 4/16/04. CAP CHECK FAILED ON 4/29/04. REPLACED BOTH CELL PACKS PN 549-1324-06 AND UNIT THEN PASSED CMM CHECKS. A/C RETURNED TO SERVICE 5/6/04. REFER TO IN HOUSE WO NR 366385 FOR ADDITIONAL INFORMATION.