Originally Posted by
Avroman
The way you stated it (the 121 flying coming first) then technically yes you could. Most 121 operations do not allow you (company policy) to do that because then you would be timed out for thier use for the holidays. Many would allow instructing or designated examiner flying as that isn't commercial flying and doesn't count against the 121 limits.
check again.... commercial flying (meaning compensation) absolutely DOES count... read a few of the license actions and NTSB reviews and you will see how bad the advice you just gave was.