What was found
AIRCRAFT RETURN AS A CONSEQUENCE OF NOSE LANDING GEAR DOOR NOT RETRACTING AND A PRESSURIZATION FAILURE. AIRCRAFT WAS SENT TO THE HANGAR. REPLACED THE NOSE GEAR ACTUATOR ASSEMBLY, NOSE GEAR BUNGEE CYLINDER, NOSE GEAR CONTROL VALVE, AND O-RINGS IAW MM. TESTS OK IAW MM. IN RELATION TO THE PRESSURIZATION REPORT, THE RIGHT FAN AND TWO CIRCUIT BREAKERS WERE CHANGED IAW MM.