As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACY - FLT 654 - AS WE PUSHED BACK AFTER ENGINE START SMOKE WAS NOTED COMING FROM VENT HOLE IN E/E COMPARTMENT AREA. SMOKE COMING FROM RIGHT A/C BATTERY VENT HOLE. REMOVED AND REPLACED BOTH A/C BATTERIES. OPS CHECK GOOD IAW DC-9 MM 24-30-01. (M)