Members of the STS Mission Management Team confer during 41-D when concern mounted over the ice crystal which formed at two water dump nozzles on the port side of Discovery. During this meeting, a decision was made not to perform a contingency EVA, but to try and dislodge it using the robot arm. The procedure was successful, and the ice crystal (inset) was photographed from the flight deck as it floated away.

Photo credit: NASA 1984