SMT ALMOST SWERVES OFF RWY BECAUSE WHEEL BRAKES ARE CONNECTED IN REVERSE.

Narrative

THE FLT PROCEEDED NORMALLY FROM THE DEP ARPT TO THE DEST ARPT UP TO THE POINT THE ACFT BEGAN TO DRIFT TO THE R DURING THE LNDG ROLLOUT. THE DRIFT TO THE R BEGAN AT APPROX 70 KTS. I BEGAN TO APPLY SOME L BRAKE PRESSURE AND INCREASED THE AMOUNT OF REVERSE ON THE L ENG TO BRING THE ACFT BACK TOWARD THE CTRLINE OF THE RWY. MY ACTIONS ONLY AGGRAVATED THE SIT. TO KEEP THE ACFT FROM PREMATURELY EXITING THE RWY; I ENGAGED THE NOSEWHEEL STEERING AND BROUGHT THE ACFT BACK TO THE RWY CTRLINE. WHILE TAXIING TO THE GATE I DECIDED TO TEST THE L MAIN WHEEL BRAKES. WITH THE NOSEWHEEL STEERING TURNED OFF; I APPLIED PRESSURE TO THE L BRAKES WHICH RESULTED IN A R TURN. I TRIED THE PROC AGAIN WITH THE SAME RESULTS. I BEGAN TO SUSPECT THAT SOMEHOW THE L AND R BRAKE SYS HAD BEEN REVERSED. I THEN APPLIED PRESSURE TO THE R BRAKES WHICH RESULTED IN A L TURN; CONFIRMING MY SUSPICIONS. I HAD MY FO CHK HIS L AND R BRAKES INDIVIDUALLY; HE RPTED THEM TO BE OPERATING NORMALLY. THE COMPANY MECHS SENT OUT TO WORK ON THE ACFT ORALLY VERIFIED THAT THE BRAKE LINES HAD BEEN ATTACHED TO THE OPPOSITE SIDES MASTER CYLINDERS ON THE CAPT'S BRAKE SETS. MOST LIKELY THIS HAD HAPPENED WHEN MAINT WORK ON THE BRAKE SYS WAS PERFORMED 4 DAYS EARLIER. I BELIEVE THERE IS A DESIGN FLAW ON THE SMT IN WHICH IT IS PHYSICALLY POSSIBLE TO ATTACH THE L AND R BRAKES LINES TO THE OPPOSITE SIDES MASTER CYLINDERS. I SUGGEST THERE BE AN OPERATIONAL CHK OF THE ENTIRE BRAKE SYS ANY TIME MORE THAN 1 BRAKE LINE IS DISCONNECTED. THIS CHK SHOULD INCLUDE A VERIFICATION THAT BOTH L AND R BRAKES BE CHKED INDIVIDUALLY FROM BOTH THE CAPT'S AND FO'S SIDES.