A300 CREW WAS REQUESTED TO DO AN 'FAA ALTERNATE BRAKE CHK' PRIOR TO DSCNT. AFTER THE CHK; THE CREW LANDED WITH ALL BRAKES LOCKED.

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FLT FROM EWR TO ZZZ. FLT WAS LATE -- LONG DUTY TIME 11 PLUS HRS ON DUTY; MAR/THUR/04. ACR ASKED US TO DO 'FAA ALTERNATE BRAKE CHK' PRIOR TO DSCNT. WE HAVE NO FORMAL TRAINING IN FLT TEST OR THIS PROC. WE ACCOMPLISHED THIS; PRESSURE CHKED GOOD. FORM PLACED IN LOGBOOK WITH INDICATIONS NOTED. DSCNT AND APCH WERE NORMAL. ACCOMPLISHED LNDG CHKLIST. FO WAS PF. WE PLANNED MANUAL BRAKING. BRAKE CHK WAS NORMAL. NICE LNDG FOLLOWED BY IMMEDIATE UNCOMMANDED BRAKING. FO CONFIRMED HE WAS NOT APPLYING BRAKES. I TOOK THE JET AT SLOW SPD. TWR ADVISED 'ACR X WE ARE ROLLING THE RESCUE EQUIP.' WE ASKED WHAT THEY SAW. TWR ADVISED 'WE SEE SMOKE AND FIRE.' ACCOMPLISHED EVAC CHKLIST. FO OPENED THE R DOOR; BUT HE HAD TO PUSH IT DUE TO THE FACT IT ONLY OPENED HALF WAY. HE ALSO HAD TO ADJUST THE SLIDE OUT THE DOOR. THE SLIDE DEPLOYED FULLY -- STAYED IN POS; FO WENT FIRST WITH THE HAZARDOUS PAPERWORK. I IMMEDIATELY FOLLOWED. WE THEN WALKED TO THE R FORWARD OF THE NOSE AND GAVE THE HAZARDOUS MATERIALS INFO TO THE FIRE CREW. THE FLT CREW NEVER SAW FIRE OR SAW SMOKE OR SMELLED SMOKE IN OR OUT OF THE ACFT. WE CONFIRMED NO FIRE BEFORE EXITING THE JET. ALL 8 MAIN TIRES WERE FLAT AND THE AREA AROUND THE TIRES WAS WET. I WAS NEVER BRIEFED BY THE FIRE CREW WHAT THEY ENCOUNTERED OR DID. THE SUDDEN DECELERATION FELT LIKE ROLLING OVER ROUGH LNDG SURFACE. IT WAS NOT A TERRIBLE JOLTING RIDE; CONSIDERING THE BRAKES WERE SOMEHOW LOCKED AT TOUCHDOWN. NO PAX; NO JUMPSEATERS; NO INJURIES. SUPPLEMENTAL INFO FROM ACN 610920: THE 'ALTERNATE BRAKE TEST' WE DID DURING THE FLT IS REQUIRED BY THE FAA EVERY 500 HRS; AND SUSPECT THAT SYS AND/OR TEST MAY HAVE CAUSED THE BRAKES TO LOCK UP AND ANTI-SKID TO NOT WORK.