What was found
(CAN) AFTER TAKEOFF PILOTS NOTICED AN UNUSUAL ROLL. OBSERVED ON THE PFCS THAT THE LH OUTBOARD SPOILER WAS DEPLOYED. BEFORE THEY COULD ACTION THE CHECKLIST, IT HAD RETRACTED. A/C RETURNED TO BASE. .T/S CARRIED OUT. WITH ROLL DISCONNECT PULLED & SYS 2 HYD ON, L/H OTBD SPOILER ACTUATOR SMOOTHLY EXTENDED THEN FULLY DEPLOYED (AND STAYED DEPLOYED) WHEN CONTROL WHEEL REACHED 2/3 OF FULL L/H CONTROL WHEEL TRAVEL. SPOILER ACTUATOR WOULD NOT RETRACT WHEN CONTROL WHEEL CENTERED AND `ONLY RETRACTED` WITH SPOILER PUSH OFF. L/H CONTROL WHEEL TRAVEL WAS VERY STIFF, R/H CONTROL WHEEL TRAVEL WAS FREE & SMOOTH. PUSH ROD DISCONNECTED FROM L/H OTBD SPOILER ACTUATOR INPUT LEVER, L/H CONTROL TRAVEL THEN FOUND FREE & SMOOTH. L/H OTBD SPOILER ACTUATOR INPUT LEVER HAD LIMITED TRAVEL WHEN MOVED BY HAND COMPARED TO AMOUNT OF TRAVEL WITH PUSH ROD CONNECTED. L/H OTBD SPOILER ACTUATOR REQUIRES REPLACEMENT. NOTE: FLT CREW REPORTED NO CAUTION LIGHTS ILLUMINATED WHEN L/H OTBD SPOILER DEPLOYED IN FLT. DURING T/S NO CAUTION LIGHTS ILLUMINATED WHEN L/H OTBD SPOILER REMAINED DEPLOYED (L/H QUADRANT DID NOT DECLUTCH DURING T/S). LH OUTBOARD ROLL SPOILER ACTUATOR WAS REPLACED IAW AMM 27-14-05. LEAK CHECKS AND OPERATIONAL CHECKS OF THE ROLL SPOILERS CARRIED OUT AND PROPER RETRACTION OF LH O/B SPOILER OBSERVED BOTH IN GROUND MODE AND WITH AIRSPEED.