Does anyone else get a flashing master caution light when maneuvering for approach? It seems like when I pull the throttle to idle on approach to get down to approach speed and then apply some throttle to maintain that speed I always get a constantly flashing master caution. I can hit the light to cancel it but it usually comes on again with my next throttle adjustment. It can be very distracting especially when landing at night. I have prop RPM at max during approach. Is this correct? I have checked my switches and I have no other warnings. My flaps and gear are lowered at the appropriate speeds and I'm using the approach speed specified in the tables. Any ideas?