Original sentence: Early models suffered from catastrophic metal fatigue, causing a string of well-publicised accidents, and the aircraft was withdrawn temporarily and redesigned.The Comet 4 series subsequently enjoyed a long and productive career of over 30 years, although sales never fully recovered
Edited sentence: Early models suffered from catastrophic metal fatigue, causing a string of well-publicized accidents, and the aircraft was withdrawn temporarily and redesigned.The Comet 4 series subsequently enjoyed a long and productive career of over 30 years; however, sales of this aircraft never fully recovered and American airliners (the Boeing 707 in particular) became the predominant airliners in the Western World