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30 hours in 7 days, 100 hours monthly, 1000 hours yearly, 8 hours in any 24- hour period. Some turboprop operators under Part 121 have Part 135 rules grandfathered in (not sure the seating limits): 34 hours in 7 days, 120 hours monthly, 1200 hours annually, and 8 hours in any 24-hour period. Keep in mind these are block hours not credit hours which are used for pay purposes.
These limits are what you can be scheduled for. Most airlines have limits on scheduling the 30 in 7 and 100 in 30 to like 27.5 and 97.5 to keep you from exceeding the limits. We however have days that are scheduled to 7hrs 55 minutes that a bad wx day can have you flyin 10 hrs.
That's partly true. However, 8 hours rest is the minimum required. If you fly anything over 4 hours, the required rest will be more than 8 hours, up to 16 if you've actually flown a full 8 hours, then you get to the default limitation of 8 in 24, (8 hours flying+16 hours rest = 24). So, it depends on how many hours you've flown since your last rest. You can exceed 8 hours in a 24 hour period but must have at least 8-hours rest in between and that assumes you've flown less than 4 hours prior to your rest.
121.481 Flight time limitations: One or two pilot crews.
(a) A certificate holder conducting flag operations may schedule a pilot to fly in an airplane that has a crew of one or two pilots for eight hours or less during any 24 consecutive hours without a rest period during these eight hours.
(b) If a certificate holder conducting flag operations schedules a pilot to fly more than eight hours during any 24 consecutive hours, it shall give him an intervening rest period, at or before the end of eight scheduled hours of flight duty. This rest period must be at least twice the number of hours flown since the preceding rest period, but not less than eight hours. The certificate holder shall relieve that pilot of all duty with it during that rest period.
(c) Each pilot who has flown more than eight hours during 24 consecutive hours must be given at least 18 hours of rest before being assigned to any duty with the certificate holder.
(d) No pilot may fly more than 32 hours during any seven consecutive days, and each pilot must be relieved from all duty for at least 24 consecutive hours at least once during any seven consecutive days.
(e) No pilot may fly as a member of a crew more than 100 hours during any one calendar month.
(f) No pilot may fly as a member of a crew more than 1,000 hours during any 12-calendar-month period.