What was found
ON TAKEOFF, AFTER LANDING GEAR HANDLE BEING MOVED TO UP POSITION GEAR FAILED TO RETRACT. 3 RED GEAR UNSAFE LIGHTS WERE ILLUMINATED & GEAR REMAINED PARTIALLY RETRACTED AS EVIDENCE BY INCREASED DRAG & WIND NOISE. QRH 32.9 EXTENDED & RETRACTED GEAR, GEAR UNSAFE LIGHTS EXTINGUISHED. JACKED ACFT IAW AMM 07-11-00. CHECKED PROX SENSORS, NO DEFECTS FOUND IAW AMM 32-60-05. CHECKED & ADJ OF LANDING CONTROL VLV, NO DEFECTS FOUND IAW AMM 32-32-00. R & R MLG RT RETRACT ACTUATOR. LEAK CHECKED GOOD IAW AMM 32-32-02. PERFORMED GEAR SWING. OPERATIONS CHECKED GOOD IAW AMM 32-30-00. LOWER ACFT & REMOVED JACK PADS IAW AMM 07-11-00.