What was found
DURING DESCENT BELOW 17000 FEET WITH SPEEDBRAKES EXTENDED IN THE 2/3 OR FULL POSITION GOT A RED GEAR UNSAFE LIGHT ON RIGHT MAIN GEAR. ALSO GOT RED LIGHT DURING TURBULANCE WITH SPEEDBRAKE RETARDED. SAME INDICATION ON SYNOPTIC PAGE. NO CURRENT FAULTS ON PSEU. MLG UP/DOOR LATCHED. 04 FLIGHT LEGS OF SENSOR WITH MARGINAL RIGGING. LAST FLIGHT LEG ALSO SHOWED "R GEAR UP AND LATCHED A/B SENSOR DISAGREE" CODE 317074. REF WDM 32-61-03 AND 32-61-04, MEGGED FOR SHORTS TO GND AND TO EACH OTHER WIRING FROM D1-80 TO PSEU. NO FAULTS NOTED.REPLACED R GEAR UP AND LATCHED SENSOR D1-80 REF AMM 32-61-15-4. OPS CHECKED GOOD (GEAR SWING).