Skyhawk 172/Cutlass 172
Flight Crew Multiengine; Flight Crew Commercial; Flight Crew Flight Instructor; Flight Crew Instrument
Flight Crew Last 90 Days 95; Flight Crew Total 771; Flight Crew Type 635
Situational Awareness; Training / Qualification
Aircraft Equipment Problem Critical
Air Traffic Control Provided Assistance; Flight Crew Landed in Emergency Condition; Flight Crew Requested ATC Assistance / Clarification; Flight Crew Returned To Departure Airport; Flight Crew Inflight Shutdown
Aircraft
A Cessna 172; first flight with a new engine break-in. All run up indications were normal; and the engine was operating fine. On departure; we proceeded to the VOR to do some holding. After a couple of laps in the hold; the engine started to lose power. Adjusting throttle then appeared to have no effect on RPM. We moved the throttle to full open and full close with no change in the RPM. We [advised ATC]; squawked 7700 and started down to a left base for Runway 28. When we started down; we realized the power was stuck at about 2100-2200 RPM. We widened out slightly to allow us to lose altitude and set up for final for Runway 28. Once we were close enough; and we both felt we had landing assured; we shut down the engine. We glided down the rest of the way and landed safely on Runway 28.
[Report narrative contained no additional information.]
C172 flight crew reported a throttle malfunction during a test flight; resulting in an in flight shutdown and return to the departure airport.