A cessna 172 pilot reported experiencing a severe engine vibration while conducting a training fligh...

Narrative:

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.

Original NASA ASRS Text

Title: A Cessna 172 pilot reported experiencing a severe engine vibration while conducting a training flight; necessitating priority landing.

Narrative: 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.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	1669120
Time
Date	201907
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	Initial Approach
Component
Aircraft Component	Engine
Person 1
Function	Instructor
Qualification	Flight Crew Commercial Flight Crew Flight Instructor
Events
Anomaly	Aircraft Equipment Problem Critical

A cessna 172 pilot reported experiencing a severe engine vibration while conducting a training flight; necessitating priority landing.