A Fixed wing equal time tour pilot can't work on his 7th day where as a equal time chopper pilot can work 28 days straight as long as he doesn't bust flight and duty times during his 28 day tour. Other stimulating details from PNG CAR Part 122 Subpart E include:
Flight hours FW Tour Pilot:
8 hours in a day. (Can be extended.)
35 hours in 7 consecutive days.
120 hours in any 28 consecutive days.
900 hours in 365 days.
Duty Time:
11 hours in a day.
60 hours in 7 days.
110 hours in 14 days.
These are the bare bones but if you need more detail just go to Part 122 Subpart E.