But does it say anywhere how frequently that 110% for less than 5 seconds can be used before there is an engineering penalty?
Common sense would say that a single event should be fine in the life of the gearbox but multiple events must have an effect on the wear and life of the gears.
Leaving it open to pilot's interpretation/guesswork is surely not what the manufacturers had in mind.
I'm not going to paste the page because Bell owns the rights to the manual, however the current L series (L, L-1, L-3, L-4) maintenance manuals have the same note in the special inspection portion of the maintenance manuals for the overtorque inspection:
"If overtorque above 100% up to 110% should occur, no inspection is required"
There is no mention of the 5 second time limit (RFM), or the necessity to track the occurrence. I do not have access to the 206B manuals but if my memory is correct it is the same.
I'm not endorsing the practice, don't shoot the messenger.