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 P/N 3301-51, S/N 2072 REMOVED FOR SCHEDULED CAPACITY CHECK ON 4/5/04 UNIT FAILED TO PASS CAPACITY CHECK. REPLACED BATTERY PACK 3301-31 AND CHARGED AND CAPACITY CHECK WAS GOOD. UNIT CHARGED AND RETURNED TO SERVICE ON 4/16/04.