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 61-0478-9, S/N 9712219 REMOVED FOR SCHEDULED CAPACITY CHECK ON 4/16/04 & 4/21/04 UNIT FAILED TO PASS CAPACITY CHECK. REPLACED CELL PACK P/N 55-2198-1 AND CHARGED AND CAPACITY CHECK WAS GOOD. UNIT CHARGED AND RETURNED TO SERVICE ON 4/25/04.