What was found
ON TAKE OFF OUT OF MEM, LANDING GEAR WOULD NOT RETRACT. RAN QRH, LANDING GEAR RETRACTED WITH LOCK OVERRIDE. LANDING GEAR EXTENDED NORMALLY ON APPROACH INTO FSD. A/C SHOWED LT TRUCK TILT SENSED IT WAS STILL ON THE GROUND. DISCONNECTED AFT END OF TRUCK TILT ACTUATOR & COULD MOVE PISTON IN & OUT FROM STOP TO STOP BY HAND. OPS CHECK OF ACTUATOR FAILED. ACTUATOR APPEARS TO BE FAILED IN BYPASS. AMM: 32-32-15-4 ON INSPECTION OF LT TRUCK TILT ACTUATOR, FOUND THE BLEED PLUG LEAKING FLUID ALLOWING ACTUATOR PISTON TO MOVE FREELY. THE PLUG WAS LOOSE, & THE O-RING WAS SEVERED. R & R THE O-RING IAW AMM 32-32-15-4 TO PREVENT FURTHER LEAKING. R & R LT MLG TRUCK TILT ACTUATOR. OPS CHECK NORMAL & LEAK CHKD GOOD. AMM 32-32-15-4. ACFT OK FOR SERVICE.