What was found
ANTISKID INOP LIGHT LIGHT ON ARRIVAL TO ACFT NOTED THAT ANTI-SKID LIGHT WAS OFF. PERFOMED STOCK. PLEASE REPLACE PARKING BRAKE VALVE, AND PERFORM OPS CK AACU BITE MEMORY RECALL REF FIM 32-42 TASK 801, NO FAULTS FOUND. OF ANTI-SKID AND AUTOBRAKE SYSTEM DEBRIEFED FLT CREW, THEY STATED THAT PRIOR TO LANDING AUTOBRAKE ACP ANTISKID/AUTOBRAKE CONTROL UNIT BITE PROCEDURE REF MM INCREASED ANTI-SKID & AUTOBRAKE GRIPES SINCE RAR OF THE PARKING DISARM LIGHT CAME ON & WENT OFF. SHORTLY AFTER ANTI-SKID LIGHT TASK32-42-801. MEMORY RECALL NO FAULTS. BITE PROCEDURE OPCK BRAKE VALVE ON 6/8. COMPONENT HISTORY SHOWS VALVE WAS CAME ON INTERMITTENTLY THEN EXTINGUISHED & REMAINED OFF UNTIL GOOD. NO CURRENT FAULTS PREVIOUSLY REMOVED FROM ANOTHER A/C FOR SAME WRITE-UP, AND TOUCHDOWN. AUTO-SPEEDBRAKES (SPOILERS) DEPLOYED NORMALLY. UPON RETURNED FROM VENDOR WITH NO FAULT FOUND. SUSPECT BAD PART FROM R&R PARKING BRAKE SHUTOFF VALVE IAW AMM 32-44-21-000-801 & 32-44-21-400-801 PARTS USED: 40-0595-3-4892,QTY :1 29-2922-9-0004,QTY :1 ADD EMP:U393284 ROTABLE PARTS CHANGE WAS INDICATED - TT # 1887861 SN OFF 6481 VALVE, MOTOR OP OFF 29-2922-9-0004 6481 ON 29-2922-9-0004 1228