What was found
APPR 20 MINS INTO OCF RECEIVED PROX SYS 1 FAULT STATUS MSG FOLLOWED BY GEAR AND FLAP ICONS THEN COULD HEAR GEAR TRYING TO EXTEND. PROBLEM PROGRESSIVELY BECAME MORE FREQUENT THROUGH REST OF FLIGHT AND RIGHT MLG GEAR STARTED SHOWING IN TRANSIT ON EICAS. COMMANDED EXTENSION FOR LANDING WAS NORMAL / REMOVED THE PINS FROM THE OLD TERMINAL BLOCK TM117 TO THE NEW TERMINAL BLOCK IAW TAP 3230-070-001-25-702-3 & RIL 13951. LANDING GEAR OPS CHECKED GOOD. PSEU REMOVED & REPLACED IAW 32-61-01-000/400-801.