hi jammedstab:
the 146 has a flight idle and ground idle engine RPM...ground idle being lower...the method the designers used to protect you from going to ground idle inflight is a little sort of metal bar/stop...this stop is moved upon WOW (weight on wheels) allowing you to pull throttles farther back after touchdown.
so, I had pulled the throttles aft for landing...and suddenly I could pull them back farther...the WOW switch had activated allowing me to pull into ground idle...and because the landing was so smooth...it was how I knew we were on the ground.
the 146 has body mounted trailing link gear which is a huge help in smooth touchdowns.