Low Mach preconditioning is a way to accelerate convergence towards steady state solution by scaling the disparate eigenvalues of a system to the same order of magnitude for time-marching schemes. The preconditioning matrix applied in FASTRAN is chosen in such a way to provide an efficient solution for both incompressible (through artificial compressibility) and low Mach flows (through pseudo-acoustic speeds). This feature in FASTRAN is demonstrated using steady flow simulation over a 2D cylinder at a freestream Mach number of 0.0004.