As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER PUSHBACK DURING TAXI AND ENGINE START, PLANE CAME BACK TO GATE (BTB) DUE TO "MAIN CARGO DOOR" LIGHT ILLUMINATED. DURING CHECK, FOUND MAIN CARGO DOOR VENT WINDOWS OPENED AND "DOOR NOT LOCKED" LIGHT ON AT THE GALLEY PANEL. CYCLED MAIN CARGO DOOR IAW AMM 52-32-00. NO FAULTS OR DEFECTS NOTED. ALL CHECKS OK.MTX RETURNED A/C TO SERVICE