As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND MAIN BATTERY LOW. SWAPPED SERVICEABLE APU BATTERY WITH MAIN BATTERY IAW AMM 24-31-01 AND 24-31-04. MAIN BATTERY OPS CHECKED GOOD IAW AMM 24-31-01. APU INOPERATIVE DUE TO APU BATTERY DISCHARGED (DDG 49-11-01A). APU BATTERY DISCHARGED (DDG 24-331-01-02). REMOVED AND REPLACED APU BATTERY IAW AMM 24-31-04. OPS CHECKED GOOD.