Narrative:

Upon arrival at aircraft, the flight attendants discovered passenger on board with no one else on board to supervise them. They also discovered the forward service door incorrectly disarmed. Upon arrival at the aircraft, the first officer discovered the cockpit door open. In accordance with the B737 operating manual, a thorough preflight inspection was accomplished.

Google
 

Original NASA ASRS Text

Title: A B737 CAPT RPTED THAT PAX WERE SITTING ON HIS ACFT BEFORE THE FLT ATTENDANTS HAD ARRIVED AND THAT THE FLT DECK DOOR WAS OPEN, CAUSING THE ENTIRE ACFT TO BE SECURITY CHKED.

Narrative: UPON ARR AT ACFT, THE FLT ATTENDANTS DISCOVERED PAX ON BOARD WITH NO ONE ELSE ON BOARD TO SUPERVISE THEM. THEY ALSO DISCOVERED THE FORWARD SVC DOOR INCORRECTLY DISARMED. UPON ARR AT THE ACFT, THE FO DISCOVERED THE COCKPIT DOOR OPEN. IN ACCORDANCE WITH THE B737 OPERATING MANUAL, A THOROUGH PREFLT INSPECTION WAS ACCOMPLISHED.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.