What was found
IND- FLT NR 647 - ON TAKEOFF THE LEFT MAIN GEAR DID NOT RETRACT, AIRCRAFT DID TURNBACK. THE PHASE CONTROL VALVE LINKAGE WAS OUT OF RIG. RE-RIGGED LINKAGE PER MM CH 32-33-06. CYCLED LDG TEN TIMES, OPS CHECK, NORMAL PER MM CH 32-30-00. (M)