Skyhawk 172/Cutlass 172
Flight Crew Commercial; Flight Crew Flight Instructor
Situational Awareness
Aircraft Equipment Problem Critical
Air Traffic Control Provided Assistance; Flight Crew Requested ATC Assistance / Clarification; Flight Crew Landed in Emergency Condition; General Evacuated
Aircraft
With student on approach to ZZZ; [the] aircraft was positioned on base for XXL as we were sequencing with other traffic; the aircraft began to violently shake to the point that the flight instruments where beginning to fall on my student. I immediately took flight controls and began to push forward all of the engine controls making sure that the engine had not been accidently leaned too far or shut off. Once I was able to tell that everything was positioned as it should be I began to climb to assure we would be able to have enough altitude in the case of an engine failure to make the runway. The second the vibration began I [requested priority handling] with the Tower due to the number or other aircraft in the pattern that could create a collision hazard due to me cutting my base to final. Once landing on the runway was assured; I lowered the flaps and executed a sideslip to get us down to the runway. Once we successfully landed; we quickly taxied to a nearby ramp and shut down the engine and evacuated the aircraft.
A Cessna 172 pilot reported experiencing a severe engine vibration while conducting a training flight; necessitating priority landing.