100% NR Cruising
Greeting fellow 412-ers!
Sorry nothing still on file from Bell, but I did get confirmation that Bell had definitely come back to our company and pointed out that they recommended all 412 operators maintain 100%NR throughout the flight range and that particular attention had to be paid to the 412 EP model to ensure that no climbs with RRPM less than 100%NR were carried out (non-emergency, that is!) .
I can, therefore, only suggest that you guys who are still ''beeping for victory'' in the cruise consider getting your companies to contact Bell directly on this subject if you have any doubt - or otherwise just to change your SOPs and FRAM damper tunings to 100% as covered in my previous posting. . I suspect that you will indeed find that such a common-sense move will result in much less wear and tear being experienced on both the rotating components of the rotorhead and on your gearboxes/power trains.
Salaams,