Originally Posted by Cefiro

You fly all 3, but as a junior line holder be prepared to fly the 200 most of the time (unless you're in IAH which is only 700's).

Originally Posted by CloudShredder

They train you on the CRJ-200, and at the end of that you have your CL-65 type rating which is good for all the CRJs. You'll do IOE on either the 200 700 or 900, and then you will do OOE (other operating experience) on the other airframes. I did my IOE on the 700, and OOE on the 200. I regularly fly both. I haven't had a chance to fly the 900 yet.

Originally Posted by Turbosina

Correct. In the summer flying rush I only flew -700s for 3 months straight, but then in September I have 4 -200 trips and one -700 trip.

Different bases have different airframe mixes. IAH only has -700s, as pointed out, while PHX (I think) only has -200s at the moment. MSP has a mix, but you'd have to bid above 20% to reliably be able to get anything other than a -200.

Good story...while on RSV, having completed -900 OOE and having only had 4 landings in that airplane, I was assigned a -900 trip with a RSV captain. Halfway through the first leg the CA turns to me and says 'Hey I haven't landed one of these things in about 4 years, do you remember the technique?'

Then his PFD and MFD went blank on downwind, so I had to land it, despite not having landed a -900 in about four or five months. It was fine, though. (For those uninitiated in the CRJ, the -200 and -700 land extremely differently, requiring different techniques in throttle reduction and flare. If you forget what variant you're flying and mix up the techniques, life gets a bit more exciting 30 feet above the ground. The -900 is rather similar to the -700, though...you just have to flare it a bit more.)