Hi viewers, I am Ayub Khan and you are watching RC CHANNEL AYUB If your helicopter is not flying and rotating one side. throttle is full you have changed trim setting but helicopter is rotating and rotating. So what are the faults? How can you repair it at home. so watch the video start to end. Let,s start. upper propeller is clock wise lower is anti clock. if your helicopter rotates clock wise so the fault is related to the clock wise shaft, motor, and gear. if it rotates anti clock. then fault is related to anti clock shaft, gear and motor. slide a screw driver in the holes of both main gears. check by rotating both rooters. upper is locked but lower is lose So the fault is found. lose a small screw of lower gear and upper rooter will become free. so take it out then pull lower blade set this is lose it should be tight. these are two holes at both sides of shaft these screws should be tight in that holes. these screws are lose. so open these screws completely For example if these screws are tight in the holes so what is next fault open the canopy and foundation of helicopter. it will become separate. take out main gear with shaft. here are also two screws tight in shaft holes. they are same if this gear is lose from here, you have to tight screws. some gears have no screws it has small cut inside so yo have to press this shaft in the gear and apply half drop of glue at this joint. it will be fixed so lets fix it again. put the piece of pipe and keep the holes straight to the screws. put a needle to straight the holes. and tight both screws. if the screws are very lose and do not become tight then you have to tight as you can. and wrap a thread on these screws. 20 rounds of this thread. cross the screws with the thread. you can open the blades for binding this. then you have to apply 1/2 drop glue on this thread at both sides it will lock the screws. put upper bearing. this is cut at the end of main shaft and this screw will be tight in this cut. put main shaft and fix lower gear. tight screw in the cut. check again with screw driver. now both rooters are locked. fix the foundation same way. tight all screws. fix the canopy. Test flight. rotation is controlled. like and share the video. Subscribe my channel below if you want to watch this type of videos hit the Bell button also. Ask any question in comment box. thanks for watching.