 Dan-Air's decision to become the first British operator of the Boeing 727 resulted in the purchase of three 100 series examples from Japan Airlines (JAL) in 1972.As these aircraft lacked high frequency (HF) radios, they needed to be flown across the Pacific with two intermediate 24-hour stops at Wake Island and Honolulu (where the aircraft refuelled and waited for the overflight of the next scheduled Tokyo – Los Angeles Boeing 747 service to provide navigational assistance for the next stage of the onward journey until Los Angeles was reached).After reaching the US, they underwent an extensive modification programme at Boeing's Wichita plant in Kansas to comply with British Civil Airworthiness Requirements (BCAR).