CAB RPT; B757; LAS-DFW. CAB JUMPSEAT SEATBELT DESIGN IS FAULTY; WHOLE SEATBELT RETRACTABLE; IN TURB; COLDN'T GET SEATBELT ON; NEED NON-RETRACTABLE LAP BELT.

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WE ENCOUNTERED HEAVY TURB AND COULD NOT SIT IN OUR JUMPSEATS AND BUCKLE IN THE JUMPSEAT BUCKLES WERE RETRACTABLE AND LOCKED AS WE PULLED ON THEM; BECAUSE OF THE VERY ROUGH TURB RETRACTABLE; THE STRAPS SHOULD NOT BE USED AROUND WAIST IF WE HAD HAD A REGULAR WAIST BUCKLE; WE COULD HAVE ENTERED THE JUMPSEAT WITH NO PROB WE WERE SORE AFTER BEING THROWN AROUND 'LIKE RAGDOLLS'; BUT WOULD HAVE BEEN BETTER OFF IN THE 30 SECONDS OF TURB WITH NON-LOCKING SEATBELTS AT THE JUMPSEAT. WE FINALLY BUCKLED IN AFTER 30 SECONDS. AFTER THE TURB SUBSIDED; WE CHKED ALL PAXS SEVERAL TIMES AND NO ONE WAS INJURED... TO OUR KNOWLEDGE. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THAT SOME OF THE B757'S DON'T HAVE THIS TYPE OF SEAT BELT; BUT ALL THE JUMP SEATS IN THE BACK ON THIS PLANE DID. ONE FA COULDN'T EVEN GET IN THE SEAT; BECAUSE OF FLYING AROUND SO MUCH. FA WAS ON THE FLOOR WITH THE RPTR'S LEGS COVERING FA; SO FA WOUDN'T HIT THE CEILING... THE RPTR USED TO TEACH EMER PROCS TRAINING; AND FA FEELS THAT JUST WARNING THE TRAINEES ABOUT THIS ISN'T GOOD ENOUGH. THIS SHOULD BE LOOKED INTO BY BOTH BOEING AND THE AIRLINE'S MGMNT. THE RPTR HAS TOLD THE UNION SAFETY COMMITTEE ABOUT THE BAD DESIGN OF THIS SEATBELT AND TO SUPVR.