912 S - High CHT Indication

Pilot had reported momentary High CT Indication on Rotax 912 S RH Engine during descent on last flight on 11 Jan 2023.

This sudden indication deflection into the red zone occurred for 3s and went normal and happened two more times before coming on and staying on after which Pilot decided to discontinue flight and land.

On checking the flight data log, we observe that E2 CHT1 remains within the green range during the flight and E2 CHT2 starts to log erratic values during that certain period only.

This engine is equipped with 01 CHT Sensor per side. Please note that we have already interchanged the CHT sensors on the engines for troubleshooting and the problem still persists on the RH Engine.