  Supernova Remnant RX J1713.7-3946 emits synchrotron X-rays and very high
energy $\gamma$-rays. Recently, thermal X-ray line emission is detected from
ejecta plasma. CO and HI observations indicate that a highly inhomogeneous
medium surrounding the SNR. It is interacting with dense molecular clouds in
the northwest and the southwest of the remnant. The origin of the $\gamma$-ray
emission from RX J1713.7-3946 is still uncertain. Detection of rapid
variability in X-ray emission from RX J1713.7-3946 indicates the magnetic field
$B$ $\sim$ mG. In this work, we investigate the time variation in X-ray flux,
luminosity and photon index of RX J1713.7-3946. For this investigation, we
study the northwest part of the remnant using Suzaku data in 2006 and 2010. We
present preliminary results based on our analysis and interpretations about
these X-ray time variability.
