As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAKEOFF, CREW RECEIVED SERVICE DOOR LIGHT & AURAL WARNING. TAKEOFF WAS ABORTED & ACFT RETURNED TO GATE. CREW FOUND FASTENER ON PRESS REFUELING ACCESS PANEL NOT SECURED. PANEL WAS SECURED & WARNING LIGHT EXTINGUISHED. ACFT RETURNED TO SERVICE.