As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE STARTING NR 1 ENGINE GOT SMOKE AFT CARGO SMOKE ECAM. DISCHARGED FWD AND AFT BOTTLES. MOMENTARILY GOT AN AFT SQUIB FAULT AND AFT BOTTLE DISCHARGE LIGHT NEVER ILLUMINATED. INSPECTED CARGO COMPARTMENTS AND DID NOT FIND ANY DEFECTS WITH SMOKE DETECTION SYSTEM OR EVIDENCE OF FIRE. REPLACED BOTH FWD AND AFT BOTTLES. SUSPECT THAT MOMENTARY SQUIB FAULT AND DISCHARGE LIGHT NOT ILLUMINATING WAS DUE TO A DELAY IN THE SQUIB FIRING. NO SPECIFIC PART/COMPONENT IS RESPONSIBLE FOR THIS PARTICULAR EVENT SINCE THE CAUSE OF THE INITIAL SMOKE INDICATION IS STILL UNKNOWN.