Cessna 152
Flight Crew Commercial; Flight Crew Instrument
Flight Crew Last 90 Days 240; Flight Crew Total 570; Flight Crew Type 350
Aircraft Equipment Problem Critical
Flight Crew Took Evasive Action; Flight Crew Landed As Precaution; General Maintenance Action
Aircraft
Initial descent into ZZZ; engine roughness and loss of power (300-400 RPM). Applied carb heat; engine continued to lose power; requested priority with tower; squawked 7700; maintained altitude and airspeed until landing at airport was assured. Landed plane without incident and taxied to FBO.
Initial descent from 3;500 feet MSL engine roughness drop of 300+ RPM. Was pilot not flying. Pic pulled carb heat. I requested priority; squawked 7700. Engine made partial power until landing.
Flight Crew reported engine roughness on approach to landing. They were able to continue to a precautionary landing.