▁offer ▁too ▁little ▁strength ▁and ▁was ▁replaced ▁with ▁one ▁fixed ▁to ▁the ▁fus el age ▁behind ▁the ▁seat ▁as ▁part ▁of ▁a ▁ 1 9 8 7 ▁Air worth iness ▁Direct ive ▁( AD ). ▁In ▁spite ▁of ▁being ▁designed ▁specifically ▁to ▁avoid ▁fat igue ▁issues , ▁the ▁series ▁has ▁been ▁subject ▁to ▁a ▁number ▁of ▁AD s ▁due ▁to ▁fat igue ▁crack ing , ▁both ▁in ▁the ▁main ▁wing ▁and ▁the ▁elev ator . ▁ ▁Vari ants ▁▁ 1 1 1 ▁F ixed ▁landing ▁g ear ▁variant ▁power ed ▁by ▁a ▁ 1 8 0 ▁h p ▁Ly coming ▁O - 3 6 0 ▁engine , ▁two ▁pro tot ypes ▁built . ▁ 1 1 2 ▁Production ▁variant ▁with ▁ret ract able ▁landing ▁g ear ▁and ▁power ed ▁by ▁a ▁ 2 0 0 ▁h p ▁Ly coming ▁IO - 3 6 0 , ▁ 1 2 5 ▁built . ▁ 1 1 2 A ▁Mark eting ▁name ▁for ▁a ▁strength ened ▁variant ▁of ▁the ▁ 1 1 2 ▁to ▁meet ▁the ▁F AR 2 3 ▁Am end ment ▁ 7 ▁requirements ▁with ▁increased ▁maximum ▁take off ▁weight , ▁ 3 6 4 ▁built . ▁ 1 1 2 B ▁ 1 1 2 A ▁with ▁an ▁increased ▁maximum ▁take off ▁weight , ▁increased ▁wings pan , ▁new ▁prop eller ▁and ▁larger ▁whe els , ▁ 4 6 ▁built . ▁ 1 1 2 TC ▁ 1 1 2 A ▁with ▁tur bo charg ed ▁Ly coming ▁TO - 3 6 0