What was found
(CAN) DURING ENDPLAY CHECK (1000 CYCLES) ON LT MAIN GEAR ACTUATOR, INPUT GEAR WAS FOUND TO HAVE 0.090 INCH ENDPLAY. THIS CHECK USED TO VERIFY THAT THRUST BEARING IS PROPERLY INSTALLED, MAXIMUM ENDPLAY IS 0.050. THESE ACTUATORS ARE OVERHAULED AT 7500 CYCLES, TSO FOR THIS ONE WAS ONLY 894. FURTHER INVESTIGATION REVEALED THAT THE SNAP RING P/N NAS 51-50 WAS NOT IN ITS GROOVE ALLOWING THE INPUT GEARS TO MOVE MORE THAT NORMAL. UNKNOWN IF THE SNAP RING WAS IMPROPERLY INSTALLED AT OVERHAUL OR IF IT CAME OUT LATER, SINCE THERE IS A POSSIBILITY THAT OTHER INTERNAL PARTS WERE DAMAGED, THE ACTUATOR WAS REMOVED FROM SERVICE AND WILL BE RETURNED TO THE OVERHAUL FACILITY FOR FURTHER INVESTIGATION.