Final answer:
The code 010BKN020 on a PIREP indicates turbulence.
Step-by-step explanation:
The code 010BKN020 on a PIREP indicates turbulence. PIREP stands for Pilot Report, which is a report filed by a pilot to provide information about the flight conditions they encountered. The code is a shorthand notation used to describe the weather conditions in the vicinity of the aircraft. In this case, 010BKN020 refers to a sky condition with broken clouds at 2,000 feet and no significant weather, but with moderate turbulence reported.