The Tu-134A can seat up to 84 passengers, in the game it can only fit 76.
Soruces
http://www.airliners...olev-tu-134/375
https://en.wikipedia.../Tupolev_Tu-134
http://www.tupolev.r...aviation/tu-134(Referes to Tu-134 (Non A or B varient)
http://www.flugzeugi...ta_tu134_en.php(Referes to a future mod on both varients of Tu-134 to increase seating)