Originally Posted by twebb

Yes, some operations of 135 pic can count for 121 time.

Serve as Captain (pilot in command) in Part 121 air carrier operations

Prior rules
ATP certificate with type rating for aircraft flown;At least 1,500 hours total time as pilot; andFirst class medical certificate.

New rules
Meet all requirements in prior rules; and
At least 1,000 flight hours in air carrier operations (as co-pilot in Part 121 operations, as Captain in fractional ownership operations, as Captain in Part 135 turbojet, commuter, or 10 or more passenger seat operations, or any combination thereof).