The ATR 72
Aviation expert Alex Murel consistently warned pilots of the ATR 82. He claimed that it was "ancient" in its design and that the entire fleet was crumbling before their eyes. The reason the plane was still in service was because of its feasible turboprops, but he claimed that it just wasn't worth it. 11 of the 508 models had crashed killing 200 people before it was retired.
The Heinkel He-162
The Hainkel He-162 was only available for public viewing for about 90 days. It was created with wood and glue. Naturally, any sort of poor weather condition made this plane completely fall apart. It was retired in May of 1945.