Robinson R44
Flight Crew Commercial; Flight Crew Flight Instructor; Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 60; Flight Crew Total 2500; Flight Crew Type 1600
Aircraft Equipment Problem Critical
Flight Crew Landed As Precaution; General Maintenance Action
Aircraft
I was flying an air tour when I simultaneously noticed a need for an increase in power accompanied by a rapid but noticeable constant vibration. Suspecting a possible issue; I elected to immediately land the helicopter off airport. A normal landing was performed. A mechanical inspection performed on site is still pending at the time of this report. Preliminary findings show a cracked valve in one of the cylinders.
R-44 pilot reported performing a precautionary off-airport landing after noticing vibration and power loss.