Complex sentence: However, the Czech Air Force was not satisfied with it for a number of reasons, in particular, the aircraft's take-off and landing rolls were felt to be excessively long, and crew complained about the cramped cabin.
Split into simpler sentences: However, the Czech Air Force was not satisfied with it for a number of reasons. In particular, the aircraft's take-off and landing rolls were felt to be excessively long, and crew complained about the cramped cabin.