ORIGINAL: redfox435cat

take off the wing and cowl and all servo hatches and look at the structure for previous repairs, check the firewall for excessive oil soaking and previous repairs, take a good look at the covering for dimples and dents, reveals hangar rash, what usually does my models in. look for twistes in the wing and cracks in the tail. if it comes with servos double check for stripped gears. If it has a motor run it.