What was found
AFTER T/O, WHEN GEAR HANDLE RAISED RMLG LIGHT STAYED ON RED, ALL OTHERS OUT. RAN QRH, LOWERD GEAR HANDLE-ALL GREEN. RAISED GEAR HANDLE AGAIN, SAME RESULT(RMLG RED), LOWER GEAR HANDLE AND AIR TURN BACK. PERFORMED LANDING GEAR SWING AND OPS TEST ON JACK PER AMM 32-30-00-0 AND AMM 07-11-00-2, FOUND RT MAIN LANDING GEAR NOT SWING UP. SWAPPED MAIN LANGING GEAR UNLOCK CYL PER AMM 32-33-02-4. REMOVED AND REPLACED RT UNLOCK CYL PER MM 32-33-02-4. REMOVED AND REPLACED THE LANDING GEAR SEL VLV REQUIRE SWING GEAR AND OPS TEST. REMOVED AND REPLACED RT UNLOCK CYL RESTRICTOR PER MM 32-33-01-4. SWING GEAR PER MM 32-31-00-5 AND 32-32-00-5, ALL FUNCTION AND IND NORMAL FACT.