In 2002 , Swiss aviation authorities performed a surprise inspection on SU-ZCF , a Flash Airlines Boeing 737-300 . They discovered missing pilot oxygen masks , a lack of oxygen tanks , and inoperable cockpit instruments . The Swiss grounded the aircraft until Flash repaired the plane . Several days later , Switzerland banned Flash . Poland also banned Flash , while tour operators in Norway ceased contracting . In early 2004 , SU-ZCF crashed while operating Flash 's Flight 604 from Sharm el-Sheikh to Paris via Cairo . The subsequent investigation exposed poor safety measures and pilot disorientation , which helped lead to the folding of Flash
Flight 604
Flash Airlines Flight 604
Flash Airlines