What was found
AFTER TAKEOFF, THE MASTER CAUTION GEAR DISAGREE EICAS WITH GEAR LEVER IN THE UP POSITION. LANDING GEAR DISAGREE LIGHT WAS ILLUMINATED. ACFT DID NOT FEEL OR SOUND AS IF A GEAR WAS EXTENDED. FOLLOWED QRH AND RETURNED TO DEPARTURE. PERFORMED AN OPS CHECK OF THE LANDING GEAR CONTROL LEVER IAW MM 32-31-01-4. OPS CHECKED GOOD. PERFORMED OPS AND LEAK CHECK ON THE NOSE GEAR LOCK ACTUATOR IAW MM 32-34-02-4. ALL OPS AND LEAK CHECKED GOOD. PERFORMED AN OPS AND LEAK CHECK OF THE NOSE GEAR SEQUENCING VALVE IAW MM 32-34-05-4. ALL OPS AND LEAK CHECKED GOOD.