UNSECURED SVC CART ROLLS FORWARD ON LNDG PROC ROLLOUT AND HITS PAX; CREATING A PERSONAL INJURY.

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AFT GALLEY SVC CART CAME LOOSE ON LNDG ROLL AND ROLLED FORWARD; INJURING A PAX. PAX WAS TREATED FOR INJURIES BY PARAMEDICS WHO MET THE ACFT AT THE GATE. WE LANDED ON BOS RWY 4R. THE TOUCHDOWN WAS SMOOTH AND LIGHT TO MEDIUM BRAKING WAS APPLIED TO ATTEMPT TO MAKE A HIGHSPD TURNOFF. THE CAPT TOLD ME TO BYPASS THE HIGHSPD TURNOFF AND I EASED OFF THE BRAKES. HE TOOK THE ACFT UNDER HIS CTL TO EXIT RWY 4R ON RWY 33R. AT NO TIME WERE THE BRAKES APPLIED TO GREATER THAN A MEDIUM LEVEL. THE ANTISKID DID NOT ACTIVATE. AFTER WE CROSSED RWY 4L AND SWITCHED TO GND CTL THE FLT ATTENDANT ADVISED US A PAX HAD BEEN INJURED BY A CART. GATE CTL WAS ADVISED TO HAVE PARAMEDICS MEET THE ACFT AT THE GATE. AN EMER WAS NOT DECLARED SINCE WE HAD AN UNOBSTRUCTED TAXI TO THE GATE. POST-FLT INSPECTION OF THE CART SAFETY LATCHES (2) SHOWED THEM TO BE SECURELY ATTACHED TO THE GALLEY STRUCTURE AND IN GOOD WORKING CONDITION. I SUSPECT THE SAFETY LATCHES WERE NOT PLACED IN THE DOWN AND LOCKED POS BY A FLT ATTENDANT PRIOR TO LNDG. MECHS INSPECTED THE LATCHES AND STATED THEY OBVIOUSLY WERE NOT USED; WHICH RESULTED IN THE CART ROLLING FORWARD ON LNDG. SUPPLEMENTAL INFO FROM ACN 231304: BEVERAGE CART BROKE LOOSE IN AFT GALLEY UPON LNDG IN BOS; AND ROLLED FORWARD INTO CABIN. AFT FLT ATTENDANT SAYS SHE SECURED IT BEFORE LNDG; BUT 'CAN'T REMEMBER FOR SURE' IF SHE ACTUALLY USED THE BIG LATCHES PROVIDED BY MANUFACTURER FOR THIS PURPOSE. OF COURSE; IF SHE HAD; THE CART COULDN'T HAVE MOVED; BUT THE IMPORTANT POINT IS THIS: THE PROPER SECURING OF THE GALLEYS IS SO IMPORTANT TO PAX AND CREW SAFETY THAT THERE SHOULD BE SOME SORT OF XCHK ON THE FLT ATTENDANTS HAVING ACCOMPLISHED IT BEFORE TKOF AND LNDG. PLTS USE CHKLISTS FOR ITEMS THAT ARE NOT AS SAFETY-RELATED AS THIS -- DO THE FLT ATTENDANTS DO LIKEWISE ON MOST AIRLINES? I SUGGEST YOU SURVEY THE INDUSTRY ON THIS ISSUE AND FORMULATE RECOMMENDATIONS FOR A FLT ATTENDANT XCHK AND OR CHKLIST TO ENSURE THE COMPLETION OF SAFETY RELATED CABIN ITEMS (SUCH AS BEVERAGE CART SECURING) AT CRITICAL TIMES OF FLT; SIMILAR TO THE COCKPIT CHKLIST.