PT symmetric Aubry-Andre model describes an array of N coupled optical
waveguides with position dependent gain and loss. We show that the reality of
the spectrum depends sensitively on the degree of disorder for small number of
lattice sites. We obtain the Hofstadter Butterfly spectrum and discuss the
existence of the phase transition from extended to localized states. We show
that rapidly changing periodical gain/loss materials almost conserves the total
intensity
