What was found
PARKING BRAKE WARNING IN CRUISE. PERSISTED MOST OF FLIGHT. PERFORMED OPS TEST OF PARKING BRAKE IAW AMM 32-45-00. COULD NOT DUPLICATE FAULT WITH PARKING BRAKE RELEASED. INTERROGATED MDC FOUND FAULT CODE B1-007492 FLAGGING PARKING BRAKE SIGNAL DISAGREE & CODE B1-007489 FLAGGING PBSOV. INSPECTED PARKING BRAKE WITCH FOUND TO BE IN RIG. INSPECTED PARKING BRAKE SWITCH WIRING, NO DEFECTS. TROUBLESHOT PARKING BRAKE WARNING IAW FIM 32-45-13. PERFORMED WIRING CHK OF PBSOV, WIRING CHKD GOOD. SUSPECT PBSOV TO BE AT FAULT. R & R PBSOV IAW AMM 32-45-13. PERFORMED OPS TEST OF PARKING BRAKE SYS IAW AMM 32-45-00. SYSTEM OPS NORMAL. NO ANTI SKID FAULT MESSAGES. ANTI SKID & PARKING BRAKE SYS OPS CHKD GOOD. REF. CHILD CAMP FOR LEAK CHK.