Basically the same for me.
Engine didn't pack up all together, but available power was not enough to sustain straight and level flight and being low level, their was little to debate.
The engine was removed and sent away for overhall as it only had around 50 hours to go anyway. We suspected some sort of carburettor contamination and I had been using a grass runway.
Recalling it now, I remember that as part of our cause for failure checks, the rpm went up immediately following the application of carb heat. Available power at that time was around 900rpm.
Once on the ground and post shutdown, the engine failed to start.