What was found
ON DEPARTURE LANDING GEAR WOULD NOT RETRACT NORMALLY. USED OVERRIDE BUTTON FOR RETRACTION. AFTER GEAR EXTENSION ''IDLE 1 UNLK'' AND ''IDLE 2 UNLK'' ILLUMINATED. CONTINUED PER QRH WITH NO REVERSE ON LANDING. UPON LANDING ''ELEC'' LIGHT ILLUMINATED. NO NOSEWHEEL STEERING WAS AVAILABLE. TAXIED TO THE GATE USING DIFFERENTIAL BRAKING AND POWER. INSTALLED SERVICEABLE WEIGHT ON WHEELS PROXIMITY SENSOR ON RIGHT MAIN GEAR. SYSTEM OPS CHECK GOOD.P/N: 20505-001