FLT ATTENDANT RPT; MD80; BOS-DFW; COCKPIT WINDOW BROKEN; RAPID DSCNT; DIVERT TO JFK. FLT CANCELED.

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AS WE WERE ENRTE TO DFW FROM BOS; WE FELT AND HEARD THE ACFT MAKE A RAPID DSCNT. THE #3 FLT ATTENDANT CAME OUT OF THE COCKPIT AND TOLD ME WE MAY EXPERIENCE A DECOMPRESSION; BUT SHE DID NOT KNOW AND LOOKED UP TO SEE THE #2 FLT ATTENDANT COME BACK TO CART AND STATE WE NEEDED TO TAKE THE CART OUT OF AISLE IMMEDIATELY. THE CAPT SOON ANNOUNCED WE WOULD BE LNDG SOON; BECAUSE THE WINDSHIELD HAD BEEN DAMAGED; AND WE WOULD BE LNDG AT JFK. I LOOKED AROUND FOR ELDERLY; YOUNG AND INCAPACITATED PAX; IN CASE A CABIN EMER AROSE. WE SECURED THE GALLEY; CALMED THE PAX; AND LANDED WITHOUT FURTHER INCIDENT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THAT THE OXYGEN MASKS DID NOT DEPLOY. THE CAPT WAS A COMPLETE PROFESSIONAL. HE CALMLY; ALMOST CASUALLY; EXPLAINED TO THE PAX THE NATURE OF THE PROB; AND THAT THEY WOULD BE DSNDING RAPIDLY; BUT ALL WAS UNDER CTL. THE WHOLE SIT WENT REALLY SMOOTHLY; AND THE LNDG UNEVENTFUL. IN JFK; THEY CHANGED TO ANOTHER ACFT AND CONTINUED ON.