ATP Written
I am in the process of studying to take my ATP written. I understand that it does not matter if you take either the 121 or the 135 test. I currently work for a 121 carrier but thought about taking the 135 test because it says to only study the 1900 performance questions rather than the 737, 727, and DC-9 questions. Could someone please verify that you can take the 135 written and still serve as a captain with a 121 operator?
Also, regarding the expiration date of the written. I understand that if you work for a 121 or 135 carrier, it will not expire. But if you get furloughed, and the clock begins to run down on it and then get hired by another carrier, does it go back to never expiring?