A CL65 CREW RPT THAT A SUDDEN STOP DURING PUSHBACK AT PWM CAUSED THEIR FLT ATTENDANT SERIOUS INJURY THAT WAS DETECTED MUCH LATER IN THE FLT.

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WHILE PWRING OUT OF THE GATE AT PWM; WE WERE MAKING A R TURN. WE HAD A MARSHALLER AND A WING WALKER ON THE L SIDE OF THE ACFT. THE MARSHALLER'S DIRECTIONS WERE TURNING US INTO THE ACFT ON OUR R SIDE. MY ATTN WAS ON THE MARSHALLER AND THE ACFT LEFT. WE WERE JUST COMPLETING THE TURN (90 DEGS TO THE TERMINAL) WHEN THE FO SAID 'THERE'S AN ACFT OVER HERE...STOP...STOP.' I FELT HIS FEET ON THE BRAKE PEDALS AND I/WE APPLIED THE BRAKES. THIS BROUGHT THE ACFT TO AN ABRUPT HALT (WE STOPPED APPROX 30 FT FROM THE OTHER ACFT). THE FLT ATTENDANT WAS STANDING IN THE GALLEY GIVING HER SAFETY BRIEFING AT THE TIME AND ENDED UP HITTING HER BACK ON THE GALLEY AREA. I SET THE PARKING BRAKE AND CALLED THE FLT ATTENDANT AND INQUIRED IF SHE NEEDED MEDICAL ASSISTANCE. SHE REPLIED THAT HER BACK WAS SORE; BUT DID NOT NEED ASSISTANCE AND THAT SHE COULD CONTINUE THE FLT. I AGAIN INQUIRED IN THE RUN-UP BLOCK WHILE WAITING FOR TKOF. INFLT; SHE EXPRESSED THAT SHE WOULD BE UNABLE TO CONTINUE HER SCHEDULE FOR THE DAY. I LATER FOUND OUT THAT SHE HAS A CRACKED VERTEBRAE IN HER BACK. THE FO AND I WERE FOLLOWING SOP FOR OUR AIRLINE. SUPPLEMENTAL INFO FROM ACN 623995: AS WE STARTED OUR TAXI; THERE WAS A COMMUTER TURBOPROP PARKED AT OUR 1 O'CLOCK POS; A GOOD DISTANCE AWAY; AND A REGIONAL JET PARKED OFF OUR R WING; ALSO A GOOD DISTANCE AWAY. OUR TAXI PATH WAS TO TAKE US BTWN THE TURBOPROP AND THE RJ. INSTEAD OF LINING UP WITH THE GAP BTWN THE PARKED PLANES; WE CONTINUED OUR TURN UNTIL OUR R WINGTIP WOULD NOT CLR THE NOSE OF THE RJ. IT WAS A VERY FOGGY MORNING; AND THE PARKED RJ WAS PAINTED WHITE. I FIRST NOTICED IT AS WE STARTED OUR TURN. AS THE TURN CONTINUED PAST THE CTR OF THE GAP I ASKED THE CAPT; 'DO YOU SEE THIS PLANE OVER HERE?' HE WAS WATCHING THE MARSHALLER AND DID NOT RESPOND. I SAID 'THERE'S A PLANE OVER HERE.' HE STILL DID NOT RESPOND. IT NOW APPEARED OUR WINGTIP WOULD NOT CLR THE RJ EVEN IF WE CONTINUED STRAIGHT; AND WE WERE STILL IN A SLIGHT R TURN. I SAID 'SLOW DOWN;' BUT THE CAPT DID NOT RESPOND. THERE WAS STILL ROOM TO MAKE A SMOOTH STOP; SO I BROUGHT MY FEET ONTO THE BRAKE PEDALS AND SAID 'STOP; STOP.' SIMULTANEOUS WITH THE SECOND 'STOP' THE CAPT FIRMLY APPLIED THE BRAKES. I WAS JERKED FORWARD IN MY STRAPS; WHICH CAUSED ME TO ALSO FIRMLY APPLY THE BRAKES. THE COMBINATION BROUGHT US TO A QUICK STOP. I DON'T KNOW WHY THE CAPT DID NOT RESPOND TO MY STATEMENTS. HE SAID THAT THE FIRST HE HEARD WAS ME SAYING; 'STOP;' SO HE EITHER DIDN'T HEAR ME OR WAS DISTR. THE FOG OBLITERATED THE HORIZON; SO HE MAY NOT HAVE REALIZED THAT HE WAS STILL TRACKING R INSTEAD OF COMING STRAIGHT OUT OF THE TURN. FINALLY; I DON'T KNOW IF THE MARSHALLER SAW THE PARKED RJ IN THE FOG. THE CAPT MIGHT HAVE BEEN FOLLOWING HIS DIRECTIONS UNTIL THE LAST MOMENT.