What was found
AFTER TAKEOFF, CREW SELECTED GEAR UP. NOTED NOSE GEAR DID NOT RETRACT AND RECEIVED MESSAGE: L/G SHOCK ABSORBER FAULT. CREW SELECTED GEAR DOWN, LANDING GEAR INDICATED DOWN AND LOCKED. AIRCRAFT RETURNED TO MSP AND LANDED WITHOUT INCIDENT. MAINTENANCE SECURED LOOSE BRACKET FOR NOSE GEAR AIR/GROUND SENSING PROXIMITY SWITCH TARGET AND FUNCTIONALLY CHECKED LANDING GEAR SYSTEM. OPERATIONAL CHECK OK.