Originally Posted by
FliFast
I believe your right, some, but not all of our 757s had a weird designator i.e. 2Q8. however, most of TWA's customer package was -31 or -231.
For example, our backwards wired 727-200s were 727-231 Adv. and I believe some of or 757s were 757-231. Good piece of trivia, Clamp.
The last 2 digits of the Boeing designations is a customer code. i.e. 31-TWA, 22-UAL, 23-AAL, 32-DAL and many many more. That is why UA aircraft will often be shown as a B757-222, B767-222, B767-322, B747-422 etc. You can tell when a carrier has acquired a second hand aircraft or another carrier's delievery slot by comparing the last 2 digits.