Skyhawk 172/Cutlass 172
Flight Crew Flight Instructor; Flight Crew Commercial; Flight Crew Instrument
Air Traffic Control Non Radar 3; Air Traffic Control Radar 4; Flight Crew Last 90 Days 100; Flight Crew Total 630; Flight Crew Type 570
Aircraft Equipment Problem Critical
Flight Crew Diverted; Flight Crew Landed As Precaution
Aircraft
Simulated engine failure down to ZZZ everything was smooth. Performed a go around; passing 900 feet; sudden reduction in power and strong vibrations. Leveled off at 1100 feet; able to maintain 100 FPM climb with max power achieving 2100 RPM. Called ZZZ1 Approach and told them we had a power reduction; they offered a landing at the ZZZ1 but declined. Didn't know how long the engine would remain running. Checked oil temp; normal. Checked oil pressure in the green; fuel was good; mags on both fuel selector on both. Landed at ZZZ with no issues. Engine produced strong vibrations at low rpm. Shut down on airport and pushed back. ZZZ Airport NOTAM'd closed.
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Flight Instructor flying a C-172 aircraft encountered engine power reduction after go-around.