Light issue

Hello, ive got an issue with object light. In the Unity preview is all seems ok, but while running on the iphone some of the object are not receiving the lights. This happened more than once in previous object which i solved by giving it a little rotate around y-axis. This time its not working… The parts are imported from Maya, but they all have the same features. Any idea why this is happening?

Well im answering myself, cause i think i know where is the problem, cause even in maya i see some disappearing of textures, guess its something with the UV mapping… or, with the extrude…