As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNIT FAILED ON WING CAPACITY CHECK. BATTERY POWER SUPPLY PN 3301-51 SN/1389, BATTERY FAILED CAPACITY CHECK ON BENCH. REPLACED BATTERY PN 3301-31 AND UNIT PASSES CMM CHECK. A/C RETURNED TO SERVICE 5/12/04. REFER TO IN HOUSE WO NR 367863 FOR ADDITIONAL INFORMATION.