Narrative:

A passenger approached #2 flight attendant about graffiti in aft lavatory. Flight attendant checked it out and found words 'bomb on plane' written in one of the lavatory compartments. She reported to captain, who in turn told us to start sabotage procedures for cabin. We prepared cabin for emergency landing. Approximately 20 mins or so later, we landed in dfw and passenger deplaned using aft door with stairs of the B727. Confusion only came when tower told captain that passenger could take their luggage with them, which significantly delayed passenger from deplaning quickly, as we had prepared them to do. Fbi and bomb squad met plane.

Related reports:

Google
 

Original NASA ASRS Text

Title: PAX ON A B727-200 RPTED GRAFFITI IN AFT LAVATORY 'BOMB ON PLANE.' FLT ATTENDANT INFORMED CAPT WHO ORDERED CABIN SABOTAGE PROCS. ACFT LANDED AND EVACED USING AFT STAIRCASE. FBI AND BOMB SQUAD MET THE ACFT.

Narrative: A PAX APCHED #2 FLT ATTENDANT ABOUT GRAFFITI IN AFT LAVATORY. FLT ATTENDANT CHKED IT OUT AND FOUND WORDS 'BOMB ON PLANE' WRITTEN IN ONE OF THE LAVATORY COMPARTMENTS. SHE RPTED TO CAPT, WHO IN TURN TOLD US TO START SABOTAGE PROCS FOR CABIN. WE PREPARED CABIN FOR EMER LNDG. APPROX 20 MINS OR SO LATER, WE LANDED IN DFW AND PAX DEPLANED USING AFT DOOR WITH STAIRS OF THE B727. CONFUSION ONLY CAME WHEN TWR TOLD CAPT THAT PAX COULD TAKE THEIR LUGGAGE WITH THEM, WHICH SIGNIFICANTLY DELAYED PAX FROM DEPLANING QUICKLY, AS WE HAD PREPARED THEM TO DO. FBI AND BOMB SQUAD MET PLANE.

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.