Early Tu-154 (1970-1974):
  a) APU nozzle does not protrude

      1)154_e1_t1  - aerodynamic ridges on the wings (for 000-021 models)
      2)154_e2_exp  - without aerodynamic ridges, export variant
      3)154_e2_exp_cone  - the same as #2 SCR air nozzles on the right side of the fuselage are covered with fairings, export variant
      4)154_e2_t1 - the same as #2 for USSR Aeroflot with Identification friend or foe (IFF) antenna
      5)154_e2_t1_cone - the same as #3 for USSR Aeroflot with Identification friend or foe (IFF) antenna
  
  b) Standard APU nozzle

      6)154_l_t1 - the same as #4
      7)154_l_t1_cone - the same as #6, SCR air nozzles on the right side of the fuselage are covered with fairings
      8)154s_t1 - Tu-154S cargo version


  
  Òó-154A

      9)154a_exp - export variant
     10)154a_exp_cone - export variant, SCR air nozzles on the right side of the fuselage are covered with fairings
     11)154a_t1 - the same as #9 for USSR Aeroflot with Identification friend or foe (IFF) antenna
     12)154a_t1_cone - the same as #10 for USSR Aeroflot with Identification friend or foe (IFF) antenna
     13)154as_t1 - Tu-154S based on Tu-154A cargo version
     
  Òó-154B/B-1/B-2 

     14)154b_1_cz - for the Czechoslovak Air Force with a long antenna on top of the fuselage 
     15)154b_1_exp - export variant
     16)154b_1_exp_cone - export variant, SCR air nozzles on the right side of the fuselage are covered with fairings
     17)154b_1_t1 - the same as #15 for USSR Aeroflot with Identification friend or foe (IFF) antenna
     18)154b_1_t1_cone - the same as #16 for USSR Aeroflot with Identification friend or foe (IFF) antenna

 Òó-154B-2  with an AWP antenna mounted on top of the fuselage (revision of the nineties)

      19)154b_2_cz - for the Czechoslovak Air Force with a long antenna on top of the fuselage  
      20)154b_2_exp - export variant
      21)154b_2_t1 - the same as #20 for Russian airlines with Identification friend or foe (IFF) antenna
      22)154b_2_t2 - the same as #20 for Russian airlines with Identification friend or foe (IFF) triangle antenna (since 1995)
      23)154b_s_1_t1 - military version, with Identification friend or foe (IFF) three-pins antenna (until 1995)
      24)154b_s_2_t2 - military version, with Identification friend or foe (IFF) triangle antenna (since 1995)

      
