What was found
PARTIAL POWER LOSS IN CRUISE RESULTING IN STRONG YAW TO THE LEFT. PRECAUTIONARY LANDING. ON RETURN FLIGHT 2 MORE STRONG YAWS TO THE LEFT OCCURRED IN THE HOVER. INSPECTION REVEALED BURNED INTAKE VALVES. HELICOPTER WAS PARKED.
- Difficulty date
- October 10, 2018
- Submitted
- August 9, 2022
- Operation
- General aviation
- Aircraft
- N41LY
- Make and model
- Robsin R44
- Aircraft serial
- 30020
- Aircraft time
- 193 hours
- Engine
- Lyc O540F1B5
- Engine time
- 193 hours
- System (JASC)
- 8530 · Reciprocating Engine Cylinder Section
- Part
- Intake Valve
- Part number
- 15F19995730
- Condition
- Burned
- Location
- Engine
- Part time
- 193 hours
- Stage of operation
- CR
- How discovered
- B
- Nature of condition
- R, E
- Precautionary procedure
- R, A
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.