Additional S-92 Modifications required to meet Canadian Requirements
There are a few modifications to the S-92 that had to be incorporated in the CH-148 to accommodate Canadian requirements. Blade and pylon fold are just a few. In addition, the CH-148 required an increase in main rotor diameter. Unless the actual airframe was increased in length, this would have reduced the clearance between the main and tail rotor arcs. This could be a contributing factor to tail vibration signatures with resulting cracking.