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 61-2275-1, S/N 9801234 REMOVED FOR SCHEDULED CAPACITY CHECK ON 4/7/04 & 4/10/04 UNIT FAILED TO PASS CAPACITY CHECK. REPLACED CELL PACK 61-2274-1 AND CHARGED AND CAPACITY CHECK WAS GOOD. UNIT CHARGED AND RETURNED TO SERVICE ON 4/16/04.