What was found
AFTER TAKEOFF, GEAR LEVER WOULD NOT GO PAST NEUTRAL. SWITCHED FROM SYS 1 TO SYS 2 WITH SAME RESULT. ALL 3 LANDING GEAR REMAINED DOWN AND LOCKED. AFTER APPROX 2 MINS, ALL PITCH TRIM AND LEVERS TRIPPED OFF AND WOULD NOT RESET, UNTIL AFTER LANDING. T/S FOUND NOSE GEAR PROXIMITY SENSORS 1 & 2 TARGETS ON LINK LOOSE. TIGHTENED LINK AND SAFTIED, CHECKED CLEARANCE IAW AMM 32-00-00-04-0 G.1(D). PERFORMED LANDING GEAR NORMAL EXTENSION/RETACTION FUNCTION TEST IAW AMM 32-31-00, BLOCK 501. CHECKS GOOD NO FAULTS. ACFT OK FOR CONT SERVICE. CLOSED.