We have a continuous mast torque limit of 81%, a 5 min take off limit of 100%, and a 5 minute limit of 100% when IAS < 105 kts. I acknowledge, as do most of our operators, that more cycles we have at the extremes of the envelope will accelerate fatigue, but I'm interested in the wording of the regulations.
The FAR that was posted was specifically about take off power, but by adding the identical limit for use in slower forward flight, does that section of the FAR still apply? If so, we wouldn't be breaking any regulations by reducing power for a short period to 'reset the clock' even in a take off condition (the second time above 81% would be the slower forward flight limit).
Has anyone seen any regulation that pertains to a 5 minute cruise limit?