Skyhawk 172/Cutlass 172
Flight Crew Flight Instructor
Aircraft Equipment Problem Less Severe
Flight Crew Landed in Emergency Condition
Aircraft
Upon arrival; [aircraft] was cleared to land and to fly direct to the left base. On an extended base we had the engine power decrease three times and the engine vibrating three times and come back to normal. We informed ATC and told them that our plan B is to land straight ahead on the road if we can't make the runway. We were cleared to land and landed with no further issues or incidents.
C172 experienced a rough-running engine on base leg. Aircraft landed without incident.