Originally Posted by
UFFL
Great Lakes is definitely 121. Pilots can do 120/month and 1200 /year though. I'm not 100% sure of the reason but I think it's due to the fact the B1900D is in the Commuter category?
This goes back to when 135 included several current 121 operators. Specifically, INTRAstate ops of 29 or fewer pax and INTERstate ops of 19 or fewer. My guess is it was a concession the feds made when they forced these 135 companies to comply with 121 regs. After all, safety is one of the FAA's top priorities.