Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Commercial; Flight Crew Flight Instructor
Flight Crew Last 90 Days 22; Flight Crew Total 1323; Flight Crew Type 502
Time Pressure; Troubleshooting
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Clearance; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
Flight Crew Landed in Emergency Condition; Flight Crew Returned To Departure Airport
Aircraft
Was climbing out of Runway ZZR and extending upwind as instructed by Tower. Started having engine roughness and pulled carb heat on. Immediately lost power to 1200-1500 RPM at full power with firing noise out of exhaust and little smoke smell reported by student. Decided to turn around and informed power of imminent engine failure and intentions. Tower instructed to make right traffic. Made left turn while squawking 7700 and [Requesting Priority Handling] and informed was coming back to the airport. Cleared to land Runway XYR; held altitude and pitched for best glide until had runway made and descended for safe landing and taxi back to ZZZ. During run-up and flight on local practice area everything was normal.
C152 Instructor reported returning to departure airport due to rough running engine.