Narrative:

I did a cabin walk-through per maintenance technician to insure that there were no tools or other items left on aircraft. At the time we looked through the aircraft, there were no tools on board. The aircraft sat in the hangar open and with a stand up to the door from XA15 until XE15, at which time it was moved to the gate. I have no idea how many people were in and out of the aircraft after XA15.

Google
 

Original NASA ASRS Text

Title: A B737-300 WAS RELEASED FOR SVC AND DELIVERED TO THE GATE. ON BOARDING PAX, TECHNICIAN'S TOOLS WERE DISCOVERED IN A SEAT.

Narrative: I DID A CABIN WALK-THROUGH PER MAINT TECHNICIAN TO INSURE THAT THERE WERE NO TOOLS OR OTHER ITEMS LEFT ON ACFT. AT THE TIME WE LOOKED THROUGH THE ACFT, THERE WERE NO TOOLS ON BOARD. THE ACFT SAT IN THE HANGAR OPEN AND WITH A STAND UP TO THE DOOR FROM XA15 UNTIL XE15, AT WHICH TIME IT WAS MOVED TO THE GATE. I HAVE NO IDEA HOW MANY PEOPLE WERE IN AND OUT OF THE ACFT AFTER XA15.

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.